Flaky-test: ProxyRefreshAuthTest.testAuthDataRefresh

### Search before asking

- [X] I searched in the [issues](https://github.com/apache/pulsar/issues) and found nothing similar.

### Example failure

https://github.com/apache/pulsar/actions/runs/4073474341/jobs/7017683165#step:11:491

### Exception stacktrace

```
Error: Tests run: 13, Failures: 1, Errors: 0, Skipped: 12, Time elapsed: 25.31 s <<< FAILURE! - in org.apache.pulsar.proxy.server.ProxyRefreshAuthTest
Error: testAuthDataRefresh(org.apache.pulsar.proxy.server.ProxyRefreshAuthTest) Time elapsed: 12.123 s <<< FAILURE!
org.awaitility.core.ConditionTimeoutException: Assertion condition defined as a org.apache.pulsar.proxy.server.ProxyRefreshAuthTest expected [true] but found [false] within 10 seconds.
at org.awaitility.core.ConditionAwaiter.await(ConditionAwaiter.java:167)
at org.awaitility.core.AssertionCondition.await(AssertionCondition.java:119)
at org.awaitility.core.AssertionCondition.await(AssertionCondition.java:31)
at org.awaitility.core.ConditionFactory.until(ConditionFactory.java:985)
at org.awaitility.core.ConditionFactory.untilAsserted(ConditionFactory.java:769)
at org.apache.pulsar.proxy.server.ProxyRefreshAuthTest.testAuthDataRefresh(ProxyRefreshAuthTest.java:172)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:568)
at org.testng.internal.invokers.MethodInvocationHelper.invokeMethod(MethodInvocationHelper.java:139)
at org.testng.internal.invokers.InvokeMethodRunnable.runOne(InvokeMethodRunnable.java:47)
at org.testng.internal.invokers.InvokeMethodRunnable.call(InvokeMethodRunnable.java:76)
at org.testng.internal.invokers.InvokeMethodRunnable.call(InvokeMethodRunnable.java:11)
at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
at java.base/java.lang.Thread.run(Thread.java:833)
Caused by: java.lang.AssertionError: expected [true] but found [false]
at org.testng.Assert.fail(Assert.java:110)
at org.testng.Assert.failNotEquals(Assert.java:1413)
at org.testng.Assert.assertTrue(Assert.java:56)
at org.testng.Assert.assertTrue(Assert.java:66)
at org.apache.pulsar.proxy.server.ProxyRefreshAuthTest.lambda$testAuthDataRefresh$3(ProxyRefreshAuthTest.java:174)
at org.awaitility.core.AssertionCondition.lambda$new$0(AssertionCondition.java:53)
at org.awaitility.core.ConditionAwaiter$ConditionPoller.call(ConditionAwaiter.java:248)
at org.awaitility.core.ConditionAwaiter$ConditionPoller.call(ConditionAwaiter.java:235)
... 4 more
```

### Are you willing to submit a PR?

- [ ] I'm willing to submit a PR!

Start with ProxyRefreshAuthTest.testAuthDataRefresh at lines 172-174 and reproduce the linked GitHub Actions failure. Investigate why the awaited assertion remains false; done means the test reliably passes without masking the underlying failure.

Written by the indexing model from the issue text.