roachtest: ssh_problem failed

roachtest.ssh_problem [failed](https://teamcity.cockroachdb.com/buildConfiguration/Cockroach_Nightlies_RoachtestNightlyGceBazel/20440882?buildTab=log) with [artifacts](https://teamcity.cockroachdb.com/buildConfiguration/Cockroach_Nightlies_RoachtestNightlyGceBazel/20440882?buildTab=artifacts#/tpccbench/nodes=3/cpu=4/mt-shared-process) on release-25.2.6-rc @ [8cc1e496e3ffc4206c9482d3ce4dad955ff44e55](https://github.com/cockroachdb/cockroach/commits/8cc1e496e3ffc4206c9482d3ce4dad955ff44e55):

```
test tpccbench/nodes=3/cpu=4/mt-shared-process failed: (cluster.go:2388).Stop: cluster.StopE: one or more parallel execution failure(s): _potential_ SSH flake (``ssh -vvv`` log retained in /artifacts/tpccbench/nodes=3/cpu=4/mt-shared-process/run_1/ssh/ssh_095850.181347410_n1_kill.log): TRANSIENT_ERROR(ssh_problem): exit status 255
test artifacts and logs in: /artifacts/tpccbench/nodes=3/cpu=4/mt-shared-process/run_1
```

Parameters:
- arch=amd64
- cloud=gce
- coverageBuild=false
- cpu=4
- encrypted=false
- runtimeAssertionsBuild=false
- ssd=0
Help

See: [roachtest README](https://github.com/cockroachdb/cockroach/blob/master/pkg/cmd/roachtest/README.md)

See: [How To Investigate \(internal\)](https://cockroachlabs.atlassian.net/l/c/SSSBr8c7)

See: [Grafana](https://go.crdb.dev/roachtest-grafana/teamcity-20440882/tpccbench-nodes-3-cpu-4-mt-shared-process/1757322241916/1757325737670)

Same failure on other branches

- #152951 roachtest: ssh_problem failed [O-roachtest O-robot T-testeng X-infra-flake branch-release-25.3.2-rc]
- #152321 roachtest: ssh_problem failed [O-roachtest O-robot T-testeng X-infra-flake branch-release-24.3.19-rc]
- #152156 roachtest: ssh_problem failed [O-roachtest O-robot T-testeng X-infra-flake branch-release-25.3.1-rc]
- #151647 roachtest: ssh_problem failed [O-roachtest O-robot T-testeng X-infra-flake branch-release-25.2.5-rc]
- #151588 roachtest: ssh_problem failed [O-roachtest O-robot T-testeng X-infra-flake branch-release-24.1.23-rc]
- #150652 roachtest: ssh_problem failed [O-roachtest O-robot T-testeng X-infra-flake branch-release-25.3.0-rc]
- #150125 roachtest: ssh_problem failed [O-roachtest O-robot T-testeng X-infra-flake branch-release-25.1.9-rc]
- #150096 roachtest: ssh_problem failed [O-roachtest O-robot T-testeng X-infra-flake branch-release-24.1.21-rc]
- #149972 roachtest: ssh_problem failed [O-roachtest O-robot T-testeng X-infra-flake branch-release-24.3.16-rc]
- #149737 roachtest: ssh_problem failed [O-roachtest O-robot T-testeng X-infra-flake branch-release-25.2.3-rc]

/cc @cockroachdb/test-eng

[This test on roachdash](https://roachdash.crdb.dev/?filter=status:open%20t:.*ssh_problem.*&sort=title+created&display=lastcommented+project) | [Improve this report!](https://github.com/cockroachdb/cockroach/tree/master/pkg/cmd/bazci/githubpost/issues)

Jira issue: CRDB-54233