release-26.2: server: TestCachedSettingDeletionIsPersisted failed

server.TestCachedSettingDeletionIsPersisted [failed](https://teamcity.cockroachdb.com/buildConfiguration/Cockroach_Ci_TestsAwsLinuxArm64_UnitTests/21410444?buildTab=log) with [artifacts](https://teamcity.cockroachdb.com/buildConfiguration/Cockroach_Ci_TestsAwsLinuxArm64_UnitTests/21410444?buildTab=artifacts#/) on release-26.2 @ [1cc3e57674e8b0ac9e8a0f79a5df7675bd77c881](https://github.com/cockroachdb/cockroach/commits/1cc3e57674e8b0ac9e8a0f79a5df7675bd77c881):

```
=== RUN TestCachedSettingDeletionIsPersisted
test_log_scope.go:172: test logs captured to: /artifacts/tmp/_tmp/5ad2fd2e72ec3b55602721d13b4f6ec3/logTestCachedSettingDeletionIsPersisted2040876780
test_log_scope.go:82: use -show-logs to present logs inline
settings_cache_test.go:215: condition failed to evaluate within 45s: from settings_cache_test.go:221: cached setting was still found

goroutine dump: /artifacts/tmp/_tmp/5ad2fd2e72ec3b55602721d13b4f6ec3/goroutine_dump_639729683.txt
panic.go:615: -- test log scope end --
test logs left over in: /artifacts/tmp/_tmp/5ad2fd2e72ec3b55602721d13b4f6ec3/logTestCachedSettingDeletionIsPersisted2040876780
--- FAIL: TestCachedSettingDeletionIsPersisted (45.74s)
```
Help

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

/cc @cockroachlabs/server

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Jira issue: CRDB-65384