pkg/util/tracing/collector/collector_test: TestClusterInflightTraces failed

pkg/util/tracing/collector/collector_test.TestClusterInflightTraces [failed](https://mesolite.cluster.engflow.com/invocations/default/45fdfcaf-cd5a-46aa-9a15-07ef70b1da97?testReportRun=2&testReportShard=1&testReportAttempt=1#targets-Ly9wa2cvdXRpbC90cmFjaW5nL2NvbGxlY3Rvcjpjb2xsZWN0b3JfdGVzdA==) on master @ [b503dd4428002dbead4907472e2121ed6bd70c8c](https://github.com/cockroachdb/cockroach/commits/b503dd4428002dbead4907472e2121ed6bd70c8c):

```
=== RUN TestClusterInflightTraces
test_log_scope.go:172: test logs captured to: outputs.zip/logTestClusterInflightTraces342339307
test_log_scope.go:82: use -show-logs to present logs inline
=== RUN TestClusterInflightTraces/separate-process
test_server_shim.go:637: DRPC is enabled (via testserver factory defaults)
```

Parameters:
- attempt=1
- race=true
- run=2
- shard=1
Help

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

/cc @cockroachlabs/obs-prs @cockroachlabs/obs-india-prs

[Improve this report!](https://github.com/cockroachdb/cockroach/tree/master/pkg/cmd/bazci/githubpost/issues)

Jira issue: CRDB-68192

Start with pkg/util/tracing/collector/collector_test and the TestClusterInflightTraces test. Reproduce the failure with the linked invocation details, including race=true, then inspect the captured outputs.zip logs. Done means the test passes reliably under the reported separate-process configuration.

Written by the indexing model from the issue text.