Docker variant of Launch agents via SSH with SSH key injection always fails

### Jenkins and plugins versions report

Environment

```text
Jenkins: 2.401.1
OS: Linux - 5.14.0-319.el9.x86_64
Java: 11.0.18 - Red Hat, Inc. (OpenJDK 64-Bit Server VM)
---
ant:487.vd79d090d4ea_e
antisamy-markup-formatter:159.v25b_c67cd35fb_
apache-httpcomponents-client-4-api:4.5.14-150.v7a_b_9d17134a_5
apache-httpcomponents-client-5-api:5.2.1-1.0
authentication-tokens:1.53.v1c90fd9191a_b_
bootstrap5-api:5.3.0-1
bouncycastle-api:2.28
branch-api:2.1105.v472604208c55
build-timeout:1.31
caffeine-api:3.1.6-115.vb_8b_b_328e59d8
checks-api:2.0.0
cloud-stats:267.v577e3742c282
cloudbees-folder:6.815.v0dd5a_cb_40e0e
commons-lang3-api:3.12.0-36.vd97de6465d5b_
commons-text-api:1.10.0-36.vc008c8fcda_7b_
credentials:1254.vb_96f366e7b_a_d
credentials-binding:604.vb_64480b_c56ca_
display-url-api:2.3.7
docker-commons:419.v8e3cd84ef49c
docker-java-api:3.3.1-79.v20b_53427e041
docker-plugin:1.4
durable-task:507.v050055d0cb_dd
echarts-api:5.4.0-5
email-ext:2.97
font-awesome-api:6.4.0-1
git:5.0.2
git-client:4.3.0
github:1.37.1
github-api:1.314-431.v78d72a_3fe4c3
github-branch-source:1725.vd391eef681a_e
gitlab-api:5.2.0-86.v1ed41a_9cf486
gitlab-plugin:1.7.14
gradle:2.8
instance-identity:142.v04572ca_5b_265
ionicons-api:56.v1b_1c8c49374e
jackson2-api:2.15.2-350.v0c2f3f8fc595
jakarta-activation-api:2.0.1-3
jakarta-mail-api:2.0.1-3
javax-activation-api:1.2.0-6
javax-mail-api:1.6.2-9
jaxb:2.3.8-1
jersey2-api:2.39.1-2
jjwt-api:0.11.5-77.v646c772fddb_0
jquery3-api:3.7.0-1
junit:1207.va_09d5100410f
ldap:682.v7b_544c9d1512
mailer:457.v3f72cb_e015e5
matrix-auth:3.1.8
matrix-project:789.v57a_725b_63c79
mina-sshd-api-common:2.10.0-69.v28e3e36d18eb_
mina-sshd-api-core:2.10.0-69.v28e3e36d18eb_
okhttp-api:4.11.0-145.vcb_8de402ef81
pam-auth:1.10
pipeline-build-step:491.v1fec530da_858
pipeline-github-lib:42.v0739460cda_c4
pipeline-graph-analysis:202.va_d268e64deb_3
pipeline-groovy-lib:656.va_a_ceeb_6ffb_f7
pipeline-input-step:468.va_5db_051498a_4
pipeline-milestone-step:111.v449306f708b_7
pipeline-model-api:2.2133.ve46a_6113dfc3
pipeline-model-definition:2.2133.ve46a_6113dfc3
pipeline-model-extensions:2.2133.ve46a_6113dfc3
pipeline-rest-api:2.32
pipeline-stage-step:305.ve96d0205c1c6
pipeline-stage-tags-metadata:2.2133.ve46a_6113dfc3
pipeline-stage-view:2.32
plain-credentials:143.v1b_df8b_d3b_e48
plugin-util-api:3.3.0
resource-disposer:0.22
scm-api:672.v64378a_b_20c60
script-security:1251.vfe552ed55f8d
snakeyaml-api:1.33-95.va_b_a_e3e47b_fa_4
ssh-agent:333.v878b_53c89511
ssh-credentials:305.v8f4381501156
ssh-slaves:2.877.v365f5eb_a_b_eec
sshd:3.303.vefc7119b_ec23
structs:324.va_f5d6774f3a_d
timestamper:1.25
token-macro:359.vb_cde11682e0c
trilead-api:2.84.v72119de229b_7
variant:59.vf075fe829ccb
workflow-aggregator:596.v8c21c963d92d
workflow-api:1213.v646def1087f9
workflow-basic-steps:1017.vb_45b_302f0cea_
workflow-cps:3673.v5b_dd74276262
workflow-durable-task-step:1247.v7f9dfea_b_4fd0
workflow-job:1308.v58d48a_763b_31
workflow-multibranch:746.v05814d19c001
workflow-scm-step:408.v7d5b_135a_b_d49
workflow-step-api:639.v6eca_cd8c04a_a_
workflow-support:839.v35e2736cfd5c
ws-cleanup:0.45
```

### What Operating System are you using (both controller, and any agents involved in the problem)?

root@jenkins ~# cat /etc/os-release
NAME="CentOS Stream"
VERSION="9"
ID="centos"
ID_LIKE="rhel fedora"
VERSION_ID="9"
PLATFORM_ID="platform:el9"
PRETTY_NAME="CentOS Stream 9"
ANSI_COLOR="0;31"
LOGO="fedora-logo-icon"
CPE_NAME="cpe:/o:centos:centos:9"
HOME_URL="https://centos.org/"
BUG_REPORT_URL="https://bugzilla.redhat.com/"
REDHAT_SUPPORT_PRODUCT="Red Hat Enterprise Linux 9"
REDHAT_SUPPORT_PRODUCT_VERSION="CentOS Stream"

*on both (controller and agent)

### Reproduction steps

- Go to Dashboard > Manage Jenkins > Nodes;
- Hit "+ New Node";
- Set Node name: {any}, Type: "Permanent Agent" and hit "Create" button;
- Set Remote root directory: /home/jenkins;
- Set Launch method: Docker variant of Launch agents via SSH with SSH key injection (provided by Docker plugin);
- Set Host: {valid agent's host available via SSH},
- Set Credentials: {valid SSH credentials like SSH username with a private key};
- Set Host Key Verification Strategy: Non verifying Verification Strategy
- Hit "Save" button.

### Expected Results

New agent node is created.

### Actual Results

Oops!
A problem occurred while processing the request.
Logging ID=0e25126c-9919-4dbe-bf35-b2cc0e9a0f06

Log output:
`
Jun 07, 2023 9:45:17 PM WARNING hudson.init.impl.InstallUncaughtExceptionHandler handleException
Caught unhandled exception with ID 0e25126c-9919-4dbe-bf35-b2cc0e9a0f06
org.kohsuke.stapler.NoStaplerConstructorException: There's no @DataBoundConstructor on any constructor of class io.jenkins.docker.connector.DockerComputerSSHConnector$InjectKeySSHLauncher
at org.kohsuke.stapler.ClassDescriptor.loadConstructorParamNames(ClassDescriptor.java:276)
at org.kohsuke.stapler.RequestImpl.instantiate(RequestImpl.java:862)
at org.kohsuke.stapler.RequestImpl$TypePair.convertJSON(RequestImpl.java:766)
Caused: java.lang.IllegalArgumentException: Failed to instantiate class io.jenkins.docker.connector.DockerComputerSSHConnector$InjectKeySSHLauncher from {"stapler-class":"io.jenkins.docker.connector.DockerComputerSSHConnector$InjectKeySSHLauncher","$class":"io.jenkins.docker.connector.DockerComputerSSHConnector$InjectKeySSHLauncher","host":"10.2.0.22","includeUser":"false","credentialsId":"4b5baa64-d620-4c03-88af-30ba63a99ada","":"3","sshHostKeyVerificationStrategy":{"stapler-class":"hudson.plugins.sshslaves.verifiers.NonVerifyingKeyVerificationStrategy","$class":"hudson.plugins.sshslaves.verifiers.NonVerifyingKeyVerificationStrategy"},"port":"22","javaPath":"","jvmOptions":"","prefixStartSlaveCmd":"","suffixStartSlaveCmd":"","launchTimeoutSeconds":"","maxNumRetries":"","retryWaitTime":"","tcpNoDelay":true,"workDir":""}
at org.kohsuke.stapler.RequestImpl$TypePair.convertJSON(RequestImpl.java:769)
at org.kohsuke.stapler.RequestImpl.bindJSON(RequestImpl.java:549)
at org.kohsuke.stapler.RequestImpl.bindJSON(RequestImpl.java:544)
at hudson.model.Descriptor.bindJSON(Descriptor.java:622)
at hudson.model.Descriptor.newInstance(Descriptor.java:592)
Caused: java.lang.LinkageError: Failed to instantiate class io.jenkins.docker.connector.DockerComputerSSHConnector$InjectKeySSHLauncher from {"stapler-class":"io.jenkins.docker.connector.DockerComputerSSHConnector$InjectKeySSHLauncher","$class":"io.jenkins.docker.connector.DockerComputerSSHConnector$InjectKeySSHLauncher","host":"10.2.0.22","includeUser":"false","credentialsId":"4b5baa64-d620-4c03-88af-30ba63a99ada","":"3","sshHostKeyVerificationStrategy":{"stapler-class":"hudson.plugins.sshslaves.verifiers.NonVerifyingKeyVerificationStrategy","$class":"hudson.plugins.sshslaves.verifiers.NonVerifyingKeyVerificationStrategy"},"port":"22","javaPath":"","jvmOptions":"","prefixStartSlaveCmd":"","suffixStartSlaveCmd":"","launchTimeoutSeconds":"","maxNumRetries":"","retryWaitTime":"","tcpNoDelay":true,"workDir":""}
at hudson.model.Descriptor.newInstance(Descriptor.java:595)
at hudson.model.Descriptor$NewInstanceBindInterceptor.instantiate(Descriptor.java:669)
at org.kohsuke.stapler.RequestImpl.instantiate(RequestImpl.java:853)
at org.kohsuke.stapler.RequestImpl$TypePair.convertJSON(RequestImpl.java:766)
at org.kohsuke.stapler.RequestImpl.bindJSON(RequestImpl.java:549)
at org.kohsuke.stapler.RequestImpl.instantiate(RequestImpl.java:875)
at org.kohsuke.stapler.RequestImpl$TypePair.convertJSON(RequestImpl.java:766)
at org.kohsuke.stapler.RequestImpl.bindJSON(RequestImpl.java:549)
at org.kohsuke.stapler.RequestImpl.bindJSON(RequestImpl.java:544)
at hudson.model.Descriptor.bindJSON(Descriptor.java:622)
at hudson.model.Descriptor.newInstance(Descriptor.java:592)
at hudson.model.ComputerSet.doDoCreateItem(ComputerSet.java:304)
at java.base/java.lang.invoke.MethodHandle.invokeWithArguments(MethodHandle.java:710)
at org.kohsuke.stapler.Function$MethodFunction.invoke(Function.java:397)
at org.kohsuke.stapler.Function$InstanceFunction.invoke(Function.java:409)
at org.kohsuke.stapler.Function.bindAndInvoke(Function.java:207)
at org.kohsuke.stapler.SelectionInterceptedFunction$Adapter.invoke(SelectionInterceptedFunction.java:36)
at org.kohsuke.stapler.verb.HttpVerbInterceptor.invoke(HttpVerbInterceptor.java:48)
at org.kohsuke.stapler.SelectionInterceptedFunction.bindAndInvoke(SelectionInterceptedFunction.java:26)
at org.kohsuke.stapler.Function.bindAndInvokeAndServeResponse(Function.java:140)
at org.kohsuke.stapler.MetaClass$11.doDispatch(MetaClass.java:558)
at org.kohsuke.stapler.NameBasedDispatcher.dispatch(NameBasedDispatcher.java:59)
at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:770)
Caused: javax.servlet.ServletException
at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:818)
at org.kohsuke.stapler.Stapler.invoke(Stapler.java:900)
at org.kohsuke.stapler.MetaClass$2.doDispatch(MetaClass.java:224)
at org.kohsuke.stapler.NameBasedDispatcher.dispatch(NameBasedDispatcher.java:59)
at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:770)
at org.kohsuke.stapler.Stapler.invoke(Stapler.java:900)
at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:836)
at org.kohsuke.stapler.Stapler.invoke(Stapler.java:900)
at org.kohsuke.stapler.MetaClass$9.dispatch(MetaClass.java:475)
at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:770)
at org.kohsuke.stapler.Stapler.invoke(Stapler.java:900)
at org.kohsuke.stapler.Stapler.invoke(Stapler.java:698)
at org.kohsuke.stapler.Stapler.service(Stapler.java:248)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:590)
at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:764)
at org.eclipse.jetty.servlet.ServletHandler$ChainEnd.doFilter(ServletHandler.java:1665)
at hudson.util.PluginServletFilter$1.doFilter(PluginServletFilter.java:157)
at jenkins.security.ResourceDomainFilter.doFilter(ResourceDomainFilter.java:81)
at hudson.util.PluginServletFilter$1.doFilter(PluginServletFilter.java:154)
at jenkins.telemetry.impl.UserLanguages$AcceptLanguageFilter.doFilter(UserLanguages.java:129)
at hudson.util.PluginServletFilter$1.doFilter(PluginServletFilter.java:154)
at hudson.util.PluginServletFilter.doFilter(PluginServletFilter.java:160)
at org.eclipse.jetty.servlet.FilterHolder.doFilter(FilterHolder.java:202)
at org.eclipse.jetty.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1635)
at hudson.security.csrf.CrumbFilter.doFilter(CrumbFilter.java:154)
at org.eclipse.jetty.servlet.FilterHolder.doFilter(FilterHolder.java:202)
at org.eclipse.jetty.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1635)
at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:94)
at jenkins.security.AcegiSecurityExceptionFilter.doFilter(AcegiSecurityExceptionFilter.java:52)
at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:99)
at hudson.security.UnwrapSecurityExceptionFilter.doFilter(UnwrapSecurityExceptionFilter.java:54)
at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:99)
at org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:126)
at org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:120)
at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:99)
at org.springframework.security.web.authentication.AnonymousAuthenticationFilter.doFilter(AnonymousAuthenticationFilter.java:100)
at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:99)
at org.springframework.security.web.authentication.rememberme.RememberMeAuthenticationFilter.doFilter(RememberMeAuthenticationFilter.java:110)
at org.springframework.security.web.authentication.rememberme.RememberMeAuthenticationFilter.doFilter(RememberMeAuthenticationFilter.java:101)
at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:99)
at org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:227)
at org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:221)
at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:99)
at jenkins.security.BasicHeaderProcessor.doFilter(BasicHeaderProcessor.java:97)
at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:99)
at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:117)
at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:87)
at hudson.security.HttpSessionContextIntegrationFilter2.doFilter(HttpSessionContextIntegrationFilter2.java:63)
at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:99)
at hudson.security.ChainedServletFilter.doFilter(ChainedServletFilter.java:111)
at hudson.security.HudsonFilter.doFilter(HudsonFilter.java:172)
at org.eclipse.jetty.servlet.FilterHolder.doFilter(FilterHolder.java:202)
at org.eclipse.jetty.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1635)
at org.kohsuke.stapler.compression.CompressionFilter.doFilter(CompressionFilter.java:53)
at org.eclipse.jetty.servlet.FilterHolder.doFilter(FilterHolder.java:202)
at org.eclipse.jetty.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1635)
at hudson.util.CharacterEncodingFilter.doFilter(CharacterEncodingFilter.java:86)
at org.eclipse.jetty.servlet.FilterHolder.doFilter(FilterHolder.java:202)
at org.eclipse.jetty.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1635)
at org.kohsuke.stapler.DiagnosticThreadNameFilter.doFilter(DiagnosticThreadNameFilter.java:30)
at org.eclipse.jetty.servlet.FilterHolder.doFilter(FilterHolder.java:202)
at org.eclipse.jetty.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1635)
at jenkins.security.SuspiciousRequestFilter.doFilter(SuspiciousRequestFilter.java:38)
at org.eclipse.jetty.servlet.FilterHolder.doFilter(FilterHolder.java:202)
at org.eclipse.jetty.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1635)
at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:527)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:131)
at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:549)
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:122)
at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:223)
at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1570)
at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:221)
at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1383)
at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:176)
at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:484)
at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1543)
at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:174)
at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1305)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:129)
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:122)
at org.eclipse.jetty.server.Server.handle(Server.java:563)
at org.eclipse.jetty.server.HttpChannel.lambda$handle$0(HttpChannel.java:505)
at org.eclipse.jetty.server.HttpChannel.dispatch(HttpChannel.java:762)
at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:497)
at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:282)
at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:314)
at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:100)
at org.eclipse.jetty.io.SelectableChannelEndPoint$1.run(SelectableChannelEndPoint.java:53)
at org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.runTask(AdaptiveExecutionStrategy.java:416)
at org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.consumeTask(AdaptiveExecutionStrategy.java:385)
at org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.tryProduce(AdaptiveExecutionStrategy.java:272)
at org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.lambda$new$0(AdaptiveExecutionStrategy.java:140)
at org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.run(ReservedThreadExecutor.java:411)
at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:934)
at org.eclipse.jetty.util.thread.QueuedThreadPool$Runner.run(QueuedThreadPool.java:1078)
at java.base/java.lang.Thread.run(Thread.java:829)
`

### Anything else?

The agent is reachable from the Jenkins controller, and account can log in on the target machine.