roachtest: cluster_creation failed

roachtest.cluster_creation [failed](https://teamcity.cockroachdb.com/buildConfiguration/Cockroach_Nightlies_Roachtests_RoachtestNightlyIbmBazel/19979202?buildTab=log) with [artifacts](https://teamcity.cockroachdb.com/buildConfiguration/Cockroach_Nightlies_Roachtests_RoachtestNightlyIbmBazel/19979202?buildTab=artifacts#/tpcc-nowait/w=1000/nodes=5/cpu=16) on master @ [32b9329f3d473380bf99c41e38cd33f9d17f45ad](https://github.com/cockroachdb/cockroach/commits/32b9329f3d473380bf99c41e38cd33f9d17f45ad):

```
test tpcc-nowait/w=1000/nodes=5/cpu=16 failed: (test_runner.go:850).func4: in provider: ibm: failed to create instance teamcity-19979202-1750393870-671-n6cpu16-0003 in region ca-tor: instance teamcity-19979202-1750393870-671-n6cpu16-0003 didn't reach stable state in 2m30s; [instance state: starting|network attached: false]
failed to create instance teamcity-19979202-1750393870-671-n6cpu16-0001 in region ca-tor: instance teamcity-19979202-1750393870-671-n6cpu16-0001 didn't reach stable state in 2m30s; [instance state: starting|network attached: false]
failed to create instance teamcity-19979202-1750393870-671-n6cpu16-0005 in region ca-tor: instance teamcity-19979202-1750393870-671-n6cpu16-0005 didn't reach stable state in 2m30s; [instance state: starting|network attached: false]
failed to create instance teamcity-19979202-1750393870-671-n6cpu16-0004 in region ca-tor: instance teamcity-19979202-1750393870-671-n6cpu16-0004 didn't reach stable state in 2m30s; [instance state: starting|network attached: false]
failed to create instance teamcity-19979202-1750393870-671-n6cpu16-0002 in region ca-tor: instance teamcity-19979202-1750393870-671-n6cpu16-0002 didn't reach stable state in 2m30s; [instance state: starting|network attached: false] [owner=test-eng]
```

Parameters:
- cloud=ibm
- coverageBuild=false
- cpu=16
- 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

[This test on roachdash](https://roachdash.crdb.dev/?filter=status:open%20t:.*cluster_creation.*&sort=title+created&display=lastcommented+project) | [Improve this report!](https://github.com/cockroachdb/cockroach/tree/master/pkg/cmd/bazci/githubpost/issues)

Jira issue: CRDB-51688

Start with the roachtest README, then inspect the linked TeamCity log and artifacts for cluster_creation on IBM in ca-tor. Investigate why all five instances remain in starting state without network attachment; done means the tpcc-nowait cluster can be created successfully or the failure is clearly diagnosed and covered by the relevant test.

Written by the indexing model from the issue text.