roachtest: cluster_creation failed

roachtest.cluster_creation [failed](https://teamcity.cockroachdb.com/buildConfiguration/Cockroach_Nightlies_RoachtestNightlyAzureBazel/20665543?buildTab=log) with [artifacts](https://teamcity.cockroachdb.com/buildConfiguration/Cockroach_Nightlies_RoachtestNightlyAzureBazel/20665543?buildTab=artifacts#/failover/non-system/blackhole-recv/lease=leader) on master @ [21b75ac6a827f784fba8cf021284f2340b596588](https://github.com/cockroachdb/cockroach/commits/21b75ac6a827f784fba8cf021284f2340b596588):

```
test failover/non-system/blackhole-recv/lease=leader failed: (test_runner.go:990).func4: in provider: azure: unable to authenticate; please use ``az login`` or double check environment variables [owner=test-eng]
```

Parameters:
- cloud=azure
- coverageBuild=false
- cpu=2
- 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-55998

Start with the failure reported at test_runner.go:990 and the roachtest README, then review the linked TeamCity log and artifacts for the Azure authentication failure. Determine whether the cluster_creation test or its environment is responsible; done means the test can authenticate to Azure and complete successfully under the reported parameters.

Written by the indexing model from the issue text.