roachtest: cluster_creation failed

roachtest.cluster_creation [failed](https://teamcity.cockroachdb.com/buildConfiguration/Cockroach_Nightlies_Roachtests_RoachtestNightlyIbmBazel/21222037?buildTab=log) with [artifacts](https://teamcity.cockroachdb.com/buildConfiguration/Cockroach_Nightlies_Roachtests_RoachtestNightlyIbmBazel/21222037?buildTab=artifacts#/ycsb/D/nodes=3/cpu=32/mvcc-range-keys=global) on release-26.1 @ [24844ddb672cac1f357899ae759f735e019c8b57](https://github.com/cockroachdb/cockroach/commits/24844ddb672cac1f357899ae759f735e019c8b57):

```
test ycsb/D/nodes=3/cpu=32/mvcc-range-keys=global failed: (test_runner.go:991).func4: invalid number of cpus 32 for IBM [owner=test-eng]
```

Parameters:
- cloud=ibm
- coverageBuild=false
- cpu=32
- diskCount=0
- 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)

/cc @cockroachdb/test-eng

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Jira issue: CRDB-61309