roachtest: ssh_problem failed

roachtest.ssh_problem [failed](https://teamcity.cockroachdb.com/buildConfiguration/Cockroach_Nightlies_RoachtestNightlyGceBazel/19931586?buildTab=log) with [artifacts](https://teamcity.cockroachdb.com/buildConfiguration/Cockroach_Nightlies_RoachtestNightlyGceBazel/19931586?buildTab=artifacts#/drop/tpcc/w=100,nodes=9) on release-25.2.2-rc @ [0780d511bd527bfd9d02f4c7ca5ecc19115d9f5e](https://github.com/cockroachdb/cockroach/commits/0780d511bd527bfd9d02f4c7ca5ecc19115d9f5e):

```
test drop/tpcc/w=100,nodes=9 failed: (cluster.go:2342).Start: cluster.StartE: cluster.Get: get ./certs failed: TRANSIENT_ERROR(ssh_problem): ~ scp -r -C -o StrictHostKeyChecking=no -o ConnectTimeout=10 -i /home/roach/.ssh/id_rsa ubuntu@34.23.10.21:./certs /tmp/roachtest-certs3544707370/certs
ssh: connect to host 34.23.10.21 port 22: Connection timed out
: exit status 1
test artifacts and logs in: /artifacts/drop/tpcc/w=100_nodes=9/run_1
```

Parameters:
- arch=amd64
- cloud=gce
- coverageBuild=false
- cpu=4
- encrypted=false
- fs=ext4
- localSSD=true
- metamorphicBufferedSender=true
- metamorphicLeases=default
- 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-19931586/drop-tpcc-w-100-nodes-9/1749891651613/1749891834191)

Same failure on other branches

- #148257 roachtest: ssh_problem failed [O-roachtest O-robot T-testeng X-infra-flake branch-release-24.1.20-rc]
- #148191 roachtest: ssh_problem failed [O-roachtest O-robot T-testeng X-infra-flake branch-release-23.2.27-rc]
- #148064 roachtest: ssh_problem failed [O-roachtest O-robot T-testeng X-infra-flake branch-release-25.1.8-rc]
- #147561 roachtest: ssh_problem failed [O-roachtest O-robot T-testeng X-infra-flake branch-release-24.1.19-rc]
- #147291 roachtest: ssh_problem failed [O-roachtest O-robot T-testeng X-infra-flake branch-release-25.2.1-rc]
- #146861 roachtest: ssh_problem failed [O-roachtest O-robot T-testeng X-infra-flake branch-release-25.1.7-rc]
- #146783 roachtest: ssh_problem failed [O-roachtest O-robot T-testeng X-infra-flake branch-release-23.2.26-rc]
- #146715 roachtest: ssh_problem failed [O-roachtest O-robot T-testeng X-infra-flake branch-release-24.3.14-rc]
- #146182 roachtest: ssh_problem failed [O-roachtest O-robot T-testeng X-infra-flake branch-release-25.1.6-rc]
- #146027 roachtest: ssh_problem failed [O-roachtest O-robot T-testeng X-infra-flake branch-release-25.2.0-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-51546