ccl/sqlproxyccl/acl: TestAllowlistLogic failed

ccl/sqlproxyccl/acl.TestAllowlistLogic [failed](https://mesolite.cluster.engflow.com/invocations/default/0f9b6878-edf4-4604-a19e-c66c44b1bbcf?testReportRun=7&testReportShard=1&testReportAttempt=1#targets-Ly9wa2cvY2NsL3NxbHByb3h5Y2NsL2FjbDphY2xfdGVzdA==) on release-24.3.28-rc @ [58e341566bf70208869ab09fa628afa9de19af2c](https://github.com/cockroachdb/cockroach/commits/58e341566bf70208869ab09fa628afa9de19af2c):

```
=== RUN TestAllowlistLogic
file_test.go:502:
Error Trace: pkg/ccl/sqlproxyccl/acl/file_test.go:502
Error: An error is expected but got nil.
Test: TestAllowlistLogic
E260226 05:39:29.628210 48 ccl/sqlproxyccl/acl/file.go:106 [-] 12 WatchList daemon stopped: context canceled
--- FAIL: TestAllowlistLogic (0.36s)
```

Parameters:
- attempt=1
- run=7
- shard=1
Help

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

/cc @cockroachdb/sqlproxy-prs @cockroachdb/server

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Jira issue: CRDB-60788