roachtest: cluster_creation failed

roachtest.cluster_creation [failed](https://teamcity.cockroachdb.com/buildConfiguration/Cockroach_Nightlies_Roachtests_RoachtestNightlyIbmBazel/20795656?buildTab=log) with [artifacts](https://teamcity.cockroachdb.com/buildConfiguration/Cockroach_Nightlies_Roachtests_RoachtestNightlyIbmBazel/20795656?buildTab=artifacts#/ycsb/D/nodes=3/cpu=32/uniform) on release-25.3 @ [3c37d936b4e1fb0c17ece11c6c014a37ca808975](https://github.com/cockroachdb/cockroach/commits/3c37d936b4e1fb0c17ece11c6c014a37ca808975):

```
test ycsb/D/nodes=3/cpu=32/uniform failed: (test_runner.go:850).func4: invalid number of cpus 32 for IBM [owner=test-eng]
```

Parameters:
- cloud=ibm
- coverageBuild=false
- cpu=32
- 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-57393