multitenant/tenantcostclient: TestConsumptionExternalStorage failed

multitenant/tenantcostclient.TestConsumptionExternalStorage [failed](https://mesolite.cluster.engflow.com/invocations/default/b6202731-e6ec-40a9-acef-9c28f03dd7f0?testReportRun=3&testReportShard=1&testReportAttempt=1#targets-Ly9wa2cvbXVsdGl0ZW5hbnQvdGVuYW50Y29zdGNsaWVudDp0ZW5hbnRjb3N0Y2xpZW50X3Rlc3Q=) on master @ [fd76d6db170472d99ccb63d72a6b7a630a0c45d0](https://github.com/cockroachdb/cockroach/commits/fd76d6db170472d99ccb63d72a6b7a630a0c45d0):

```
=== RUN TestConsumptionExternalStorage
test_log_scope.go:172: test logs captured to: outputs.zip/logTestConsumptionExternalStorage736953361
test_log_scope.go:82: use -show-logs to present logs inline
=== RUN TestConsumptionExternalStorage/export_from_a_host_does_not_increment_ingress_bytes
```

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

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

Jira issue: CRDB-67980

Start with multitenant/tenantcostclient.TestConsumptionExternalStorage, especially the export_from_a_host_does_not_increment_ingress_bytes subtest, and inspect the linked test report and captured logs. Reproduce the failure with the reported race=true parameters, then verify that the subtest passes without introducing new failures.

Written by the indexing model from the issue text.