Flaky test - ConnectionPoolTest.interruptStopsThread

failing in various PRs

https://github.com/square/okhttp/actions/runs/12527800591/job/34941738714?pr=8641

```
> Task :okhttp:jvmTest

ConnectionPoolTest[jvm] > interruptStopsThread()[jvm] FAILED
    org.opentest4j.AssertionFailedError: expected to not be empty
        at app//okhttp3.internal.connection.ConnectionPoolTest.interruptStopsThread(ConnectionPoolTest.kt:203
```