roachtest: cluster_creation failed

roachtest.cluster_creation [failed](https://teamcity.cockroachdb.com/buildConfiguration/Cockroach_Nightlies_Roachtests_RoachtestNightlyIbmBazel/20597397?buildTab=log) with [artifacts](https://teamcity.cockroachdb.com/buildConfiguration/Cockroach_Nightlies_Roachtests_RoachtestNightlyIbmBazel/20597397?buildTab=artifacts#/jepsen/sequential/start-stop-2) on release-25.3 @ [3bc58d4160d543f0721761e921cf5f9887bf55bc](https://github.com/cockroachdb/cockroach/commits/3bc58d4160d543f0721761e921cf5f9887bf55bc):

```
test jepsen/sequential/start-stop-2 failed: (test_runner.go:850).func4: in provider: ibm: unable to import SSH key in region ca-tor: creating this SSH key will put user over quota. Allocated: 201, Quota: 200 [owner=test-eng]
```

Parameters:
- cloud=ibm
- coverageBuild=false
- cpu=4
- 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)

/cc @cockroachdb/test-eng

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Jira issue: CRDB-55401