It seems this test stated failing on Dec 1st

**Build scan:**
https://gradle-enterprise.elastic.co/s/d7426kw4dcfxg/tests/:server:test/org.elasticsearch.watcher.FileWatcherTests/testSimpleFileOperations

**Reproduction line:**
`./gradlew ':server:test' --tests "org.elasticsearch.watcher.FileWatcherTests.testSimpleFileOperations" -Dtests.seed=B6EC439B4D4CE3D6 -Dtests.locale=sv -Dtests.timezone=Etc/GMT-13 -Druntime.java=17`

**Applicable branches:**
master, 8.0

**Reproduces locally?:**
No

**Failure history:**
https://gradle-enterprise.elastic.co/scans/tests?tests.container=org.elasticsearch.watcher.FileWatcherTests&tests.test=testSimpleFileOperations

**Failure excerpt:**
```
java.lang.AssertionError: 
Expected: iterable containing ["onFileChanged: test.txt"]
     but: no item was "onFileChanged: test.txt"

  at __randomizedtesting.SeedInfo.seed([B6EC439B4D4CE3D6:59621166A963CE02]:0)
  at org.hamcrest.MatcherAssert.assertThat(MatcherAssert.java:18)
  at org.junit.Assert.assertThat(Assert.java:956)
  at org.junit.Assert.assertThat(Assert.java:923)
  at org.elasticsearch.watcher.FileWatcherTests.testSimpleFileOperations(FileWatcherTests.java:111)
  at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(NativeMethodAccessorImpl.java:-2)
  at jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
  at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
  at java.lang.reflect.Method.invoke(Method.java:568)
  at com.carrotsearch.randomizedtesting.RandomizedRunner.invoke(RandomizedRunner.java:1758)
  at com.carrotsearch.randomizedtesting.RandomizedRunner$8.evaluate(RandomizedRunner.java:946)
  at com.carrotsearch.randomizedtesting.RandomizedRunner$9.evaluate(RandomizedRunner.java:982)
  at com.carrotsearch.randomizedtesting.RandomizedRunner$10.evaluate(RandomizedRunner.java:996)
  at com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
  at org.apache.lucene.util.TestRuleSetupTeardownChained$1.evaluate(TestRuleSetupTeardownChained.java:44)
  at org.apache.lucene.util.AbstractBeforeAfterRule$1.evaluate(AbstractBeforeAfterRule.java:43)
  at org.apache.lucene.util.TestRuleThreadAndTestName$1.evaluate(TestRuleThreadAndTestName.java:45)
  at org.apache.lucene.util.TestRuleIgnoreAfterMaxFailures$1.evaluate(TestRuleIgnoreAfterMaxFailures.java:60)
  at org.apache.lucene.util.TestRuleMarkFailure$1.evaluate(TestRuleMarkFailure.java:44)
  at com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
  at com.carrotsearch.randomizedtesting.ThreadLeakControl$StatementRunner.run(ThreadLeakControl.java:375)
  at com.carrotsearch.randomizedtesting.ThreadLeakControl.forkTimeoutingTask(ThreadLeakControl.java:824)
  at com.carrotsearch.randomizedtesting.ThreadLeakControl$3.evaluate(ThreadLeakControl.java:475)
  at com.carrotsearch.randomizedtesting.RandomizedRunner.runSingleTest(RandomizedRunner.java:955)
  at com.carrotsearch.randomizedtesting.RandomizedRunner$5.evaluate(RandomizedRunner.java:840)
  at com.carrotsearch.randomizedtesting.RandomizedRunner$6.evaluate(RandomizedRunner.java:891)
  at com.carrotsearch.randomizedtesting.RandomizedRunner$7.evaluate(RandomizedRunner.java:902)
  at org.apache.lucene.util.AbstractBeforeAfterRule$1.evaluate(AbstractBeforeAfterRule.java:43)
  at com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
  at org.apache.lucene.util.TestRuleStoreClassName$1.evaluate(TestRuleStoreClassName.java:38)
  at com.carrotsearch.randomizedtesting.rules.NoShadowingOrOverridesOnMethodsRule$1.evaluate(NoShadowingOrOverridesOnMethodsRule.java:40)
  at com.carrotsearch.randomizedtesting.rules.NoShadowingOrOverridesOnMethodsRule$1.evaluate(NoShadowingOrOverridesOnMethodsRule.java:40)
  at com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
  at com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
  at org.apache.lucene.util.TestRuleAssertionsRequired$1.evaluate(TestRuleAssertionsRequired.java:53)
  at org.apache.lucene.util.AbstractBeforeAfterRule$1.evaluate(AbstractBeforeAfterRule.java:43)
  at org.apache.lucene.util.TestRuleMarkFailure$1.evaluate(TestRuleMarkFailure.java:44)
  at org.apache.lucene.util.TestRuleIgnoreAfterMaxFailures$1.evaluate(TestRuleIgnoreAfterMaxFailures.java:60)
  at org.apache.lucene.util.TestRuleIgnoreTestSuites$1.evaluate(TestRuleIgnoreTestSuites.java:47)
  at com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
  at com.carrotsearch.randomizedtesting.ThreadLeakControl$StatementRunner.run(ThreadLeakControl.java:375)
  at com.carrotsearch.randomizedtesting.ThreadLeakControl.lambda$forkTimeoutingTask$0(ThreadLeakControl.java:831)
  at java.lang.Thread.run(Thread.java:833)

```
server/src/test/java/org/elasticsearch/watcher/FileWatcherTests.java
fileWatcher.checkAndNotify();
        assertThat(changes.notifications(), containsInAnyOrder("onFileChanged: test-dir/test1.txt", "onFileCreated: test-dir/test5.txt"));
        
        Files.writeString(testDir.resolve("test2.txt"), "changed", StandardCharsets.UTF_8);
        
        
        Files.setLastModifiedTime(testDir.resolve("test3.txt"), FileTime.fromMillis(startTime - 50));
        changes.notifications().clear();
        fileWatcher.checkAndNotify();
        assertThat(changes.notifications(), containsInAnyOrder(equalTo("onFileChanged: test-dir/test2.txt")));
        
        Files.writeString(testDir.resolve("test2.txt"), "new contents", StandardCharsets.UTF_8);
        Files.writeString(testDir.resolve("test3.txt"), "updated", StandardCharsets.UTF_8);
        changes.notifications().clear();
        fileWatcher.checkAndNotify();
        assertThat(
            changes.notifications(),
            containsInAnyOrder(equalTo("onFileChanged: test-dir/test2.txt"), equalTo("onFileChanged: test-dir/test3.txt"))
        );
        
        Files.setLastModifiedTime(testDir.resolve("test2.txt"), FileTime.fromMillis(System.currentTimeMillis() + 3));
        Files.setLastModifiedTime(testDir.resolve("test3.txt"), FileTime.fromMillis(System.currentTimeMillis() + 3));
        changes.notifications().clear();
        fileWatcher.checkAndNotify();
        assertThat(changes.notifications(), hasSize(0));
        
        fileWatcher.checkAndNotify();
        assertThat(changes.notifications(), hasSize(0));
        
        Files.delete(testDir.resolve("test1.txt"));