[Test] More accurate pattern matching for testWatchdogLogging (elastic#128648)

There might be other thread temporarily not making progress and reported
by the watchdog. This PR tightens up the pattern matching for the
expected thread name.

Resolves: elastic#128646

Author: ywangd

test/framework/src/main/java/org/elasticsearch/transport/AbstractSimpleTransportTestCase.java

@@ -3354,7 +3354,7 @@ public void testWatchdogLogging() {
         MockLog.assertThatLogger(
             deterministicTaskQueue::runAllRunnableTasks,
             ThreadWatchdog.class,
-            new MockLog.UnseenEventExpectation("no logging", ThreadWatchdog.class.getCanonicalName(), Level.WARN, "*")
+            new MockLog.UnseenEventExpectation("no logging", ThreadWatchdog.class.getCanonicalName(), Level.WARN, "*" + threadName + "*")
         );
         deterministicTaskQueue.advanceTime();
         MockLog.assertThatLogger(