release-26.3: roachtest: ssh_problem failed

roachtest.ssh_problem [failed](https://teamcity.cockroachdb.com/buildConfiguration/Cockroach_Nightlies_RoachtestNightlyGceBazel/21392022?buildTab=log) with [artifacts](https://teamcity.cockroachdb.com/buildConfiguration/Cockroach_Nightlies_RoachtestNightlyGceBazel/21392022?buildTab=artifacts#/inspect/throughput/bulkingest/nodes=12/cpu=8/rows=500000000/checks=1/unique/complex=false) on release-26.3 @ [8a9a8e3305daa0890b7b083c13cb572f911bd6cc](https://github.com/cockroachdb/cockroach/commits/8a9a8e3305daa0890b7b083c13cb572f911bd6cc):

```
test inspect/throughput/bulkingest/nodes=12/cpu=8/rows=500000000/checks=1/unique/complex=false failed: (test_runner.go:1017).func4: cluster.PutE: put "/go/src/github.com/cockroachdb/cockroach/bin/cockroach.linux-amd64" failed: TRANSIENT_ERROR(ssh_problem): ~ scp -r -C -o StrictHostKeyChecking=no -o ConnectTimeout=10 -R -A -i /home/roach/.ssh/id_rsa ubuntu@35.243.250.75:./cockroach ubuntu@34.148.65.24:./cockroach
ssh: connect to host 34.148.65.24 port 22: Connection timed out
lost connection: exit status 1 [owner=test-eng]
```

Parameters:
- arch=amd64
- cloud=gce
- coverageBuild=false
- cpu=8
- diskCount=0
- encrypted=false
- fs=ext4
- localSSD=true
- runtimeAssertionsBuild=false
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-21392022/inspect-throughput-bulkingest-nodes-12-cpu-8-rows-500000000-che/-62135596800000/-62135596680000)

See: [Datadog Logs](https://us5.datadoghq.com/logs?query=service%3Aroachtest+%40cluster%3Ateamcity-21392022-1781763104-188-n13cpu8-geo&from_ts=-62135596800000&to_ts=-62135596680000&live=false&storage=flex_tier)

/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-64927

Start with pkg/cmd/roachtest/README.md and test_runner.go around line 1017, then review the linked TeamCity artifacts, Grafana dashboard, and Datadog logs. Determine why the GCE roachtest encountered the SSH timeout and verify the relevant test completes successfully without the ssh_problem failure.

Written by the indexing model from the issue text.