Docker Command setting is ignored

### Jenkins and plugins versions report

Environment

```text
Jenkins: 2.346.3
OS: Linux - 5.15.0-43-generic
---
ace-editor:1.1
antisamy-markup-formatter:2.7
apache-httpcomponents-client-4-api:4.5.13-138.v4e7d9a_7b_a_e61
authentication-tokens:1.4
azure-ad:267.v5b_dfb_514d9fd
azure-sdk:118.v43f74dd9ca_dc
bootstrap5-api:5.2.0-3
bouncycastle-api:2.26
branch-api:2.1046.v0ca_37783ecc5
build-timeout:1.23
caffeine-api:2.9.3-65.v6a_47d0f4d1fe
checks-api:1.7.5
cloudbees-folder:6.740.ve4f4ffa_dea_54
command-launcher:84.v4a_97f2027398
credentials:1139.veb_9579fca_33b_
credentials-binding:523.vd859a_4b_122e6
display-url-api:2.3.6
docker-commons:1.21
docker-java-api:3.2.13-37.vf3411c9828b9
docker-plugin:1.2.9
durable-task:500.v8927d9fd99d8
echarts-api:5.3.3-1
email-ext:2.91
font-awesome-api:6.1.2-1
generic-webhook-trigger:1.84
git:4.11.5
git-client:3.11.2
github:1.34.5
github-api:1.303-400.v35c2d8258028
github-branch-source:1687.v7618247e672d
handlebars:3.0.8
jackson2-api:2.13.3-285.vc03c0256d517
jakarta-activation-api:2.0.1-1
jakarta-mail-api:2.0.1-1
javax-activation-api:1.2.0-4
javax-mail-api:1.6.2-7
jaxb:2.3.6-1
jdk-tool:55.v1b_32b_6ca_f9ca
jjwt-api:0.11.5-77.v646c772fddb_0
jquery3-api:3.6.0-4
jsch:0.1.55.61.va_e9ee26616e7
junit:1119.1121.vc43d0fc45561
mailer:435.v79ef3972b_5c7
matrix-auth:3.1.5
matrix-project:772.v494f19991984
mina-sshd-api-common:2.8.0-36.v8e25ce90d4b_1
mina-sshd-api-core:2.8.0-36.v8e25ce90d4b_1
momentjs:1.1.1
okhttp-api:4.9.3-108.v0feda04578cf
pam-auth:1.10
pipeline-build-step:2.18
pipeline-github-lib:38.v445716ea_edda_
pipeline-graph-analysis:195.v5812d95a_a_2f9
pipeline-groovy-lib:612.v84da_9c54906d
pipeline-input-step:449.v77f0e8b_845c4
pipeline-milestone-step:101.vd572fef9d926
pipeline-model-api:2.2114.v2654ca_721309
pipeline-model-definition:2.2114.v2654ca_721309
pipeline-model-extensions:2.2114.v2654ca_721309
pipeline-rest-api:2.24
pipeline-stage-step:293.v200037eefcd5
pipeline-stage-tags-metadata:2.2114.v2654ca_721309
pipeline-stage-view:2.24
plain-credentials:139.ved2b_9cf7587b
plugin-util-api:2.17.0
popper2-api:2.11.6-1
resource-disposer:0.19
scm-api:621.vda_a_b_055e58f7
script-security:1175.v4b_d517d6db_f0
snakeyaml-api:1.30.2-76.vc104f7ce9870
ssh-credentials:295.vced876c18eb_4
ssh-slaves:1.834.v622da_57f702c
sshd:3.242.va_db_9da_b_26a_c3
structs:324.va_f5d6774f3a_d
timestamper:1.18
token-macro:308.v4f2b_ed62b_b_16
trilead-api:1.67.vc3938a_35172f
variant:59.vf075fe829ccb
workflow-aggregator:590.v6a_d052e5a_a_b_5
workflow-api:1192.v2d0deb_19d212
workflow-basic-steps:991.v43d80fea_ff66
workflow-cps:2759.v87459c4eea_ca_
workflow-durable-task-step:1199.v02b_9244f8064
workflow-job:1207.ve6191ff089f8
workflow-multibranch:716.vc692a_e52371b_
workflow-scm-step:400.v6b_89a_1317c9a_
workflow-step-api:639.v6eca_cd8c04a_a_
workflow-support:838.va_3a_087b_4055b
ws-cleanup:0.42
```

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

Ubuntu 20.04

### Reproduction steps

1. Configure a docker agent template that uses a Docker command of `/usr/local/bin/jenkins-agent`.

2. Use `docker inspect` to look at the spawned containers.

### Expected Results

I should see something like

```json
"Cmd": [
"/usr/local/bin/jenkins-agent",
"-url",
"http://jenkins:8080/jenkins/",
"be19b150aa47971fe5ad5e1f92b080c551f3d7942f7f903e32b38ac8c43e0dcb",
"agent-0015t2ekpgmuj"
],
```

### Actual Results

The docker command is skipped:

```json
"Cmd": [
"-url",
"http://jenkins:8080/jenkins/",
"be19b150aa47971fe5ad5e1f92b080c551f3d7942f7f903e32b38ac8c43e0dcb",
"agent-0015t2ekpgmuj"
],
```

### Anything else?

_No response_