multitenant/tenantcostclient: TestRUSettingsChanged failed

multitenant/tenantcostclient.TestRUSettingsChanged [failed](https://mesolite.cluster.engflow.com/invocations/default/635bb604-d15c-4605-a9d9-fb97bdfb2356?testReportRun=3&testReportShard=1&testReportAttempt=1#targets-Ly9wa2cvbXVsdGl0ZW5hbnQvdGVuYW50Y29zdGNsaWVudDp0ZW5hbnRjb3N0Y2xpZW50X3Rlc3Q=) on master @ [51724666acd282f24b00c679fa86ade5738e4f56](https://github.com/cockroachdb/cockroach/commits/51724666acd282f24b00c679fa86ade5738e4f56):

```
=== RUN TestRUSettingsChanged
test_log_scope.go:172: test logs captured to: outputs.zip/logTestRUSettingsChanged1948257960
test_log_scope.go:82: use -show-logs to present logs inline
```

Parameters:
- attempt=1
- race=true
- run=3
- shard=1
Help

See also: [How To Investigate a Go Test Failure \(internal\)](https://cockroachlabs.atlassian.net/l/c/HgfXfJgM)

/cc @cockroachlabs/server

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

Jira issue: CRDB-66159

Start with multitenant/tenantcostclient.TestRUSettingsChanged and inspect the linked EngFlow invocation and captured outputs.zip logs; rerun the test with -show-logs and the listed race, run, and shard parameters. Done means the failure is understood and the test passes reliably on master without regressing related tenant cost client behavior.

Written by the indexing model from the issue text.