Only Windows runs are failing.

**Build scan:**
https://gradle-enterprise.elastic.co/s/zyijl5succa7u/tests/:modules:data-streams:internalClusterTest/org.elasticsearch.datastreams.DataStreamIT/testWriteLoadAndAvgShardSizeIsStoredInABestEffort

**Reproduction line:**
```
gradlew ':modules:data-streams:internalClusterTest' --tests "org.elasticsearch.datastreams.DataStreamIT.testWriteLoadAndAvgShardSizeIsStoredInABestEffort" -Dtests.seed=38CC3C8574AEB1D8 -Dtests.locale=es-PA -Dtests.timezone=Pacific/Tongatapu -Druntime.java=19
```

**Applicable branches:**
8.6, main

**Reproduces locally?:**
Didn't try

**Failure history:**
https://gradle-enterprise.elastic.co/scans/tests?tests.container=org.elasticsearch.datastreams.DataStreamIT&tests.test=testWriteLoadAndAvgShardSizeIsStoredInABestEffort

**Failure excerpt:**
```
java.lang.AssertionError: 
Expected: is not null
     but: was null

  at __randomizedtesting.SeedInfo.seed([38CC3C8574AEB1D8:9CF0E198064B4DB3]: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.datastreams.DataStreamIT.testWriteLoadAndAvgShardSizeIsStoredInABestEffort(DataStreamIT.java:2113)
  at jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:104)
  at java.lang.reflect.Method.invoke(Method.java:578)
  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.tests.util.TestRuleSetupTeardownChained$1.evaluate(TestRuleSetupTeardownChained.java:44)
  at org.apache.lucene.tests.util.AbstractBeforeAfterRule$1.evaluate(AbstractBeforeAfterRule.java:43)
  at org.apache.lucene.tests.util.TestRuleThreadAndTestName$1.evaluate(TestRuleThreadAndTestName.java:45)
  at org.apache.lucene.tests.util.TestRuleIgnoreAfterMaxFailures$1.evaluate(TestRuleIgnoreAfterMaxFailures.java:60)
  at org.apache.lucene.tests.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:390)
  at com.carrotsearch.randomizedtesting.ThreadLeakControl.forkTimeoutingTask(ThreadLeakControl.java:843)
  at com.carrotsearch.randomizedtesting.ThreadLeakControl$3.evaluate(ThreadLeakControl.java:490)
  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.tests.util.AbstractBeforeAfterRule$1.evaluate(AbstractBeforeAfterRule.java:43)
  at com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
  at org.apache.lucene.tests.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.tests.util.TestRuleAssertionsRequired$1.evaluate(TestRuleAssertionsRequired.java:53)
  at org.apache.lucene.tests.util.AbstractBeforeAfterRule$1.evaluate(AbstractBeforeAfterRule.java:43)
  at org.apache.lucene.tests.util.TestRuleMarkFailure$1.evaluate(TestRuleMarkFailure.java:44)
  at org.apache.lucene.tests.util.TestRuleIgnoreAfterMaxFailures$1.evaluate(TestRuleIgnoreAfterMaxFailures.java:60)
  at org.apache.lucene.tests.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:390)
  at com.carrotsearch.randomizedtesting.ThreadLeakControl.lambda$forkTimeoutingTask$0(ThreadLeakControl.java:850)
  at java.lang.Thread.run(Thread.java:1589)

```
modules/data-streams/src/internalClusterTest/java/org/elasticsearch/datastreams/DataStreamIT.java
{"_doc":{"properties": {"my_field":{"type":"keyword"}}}}""", XContentType.JSON), false);
        verifyResolvability(dataStreamName, client().admin().indices().prepareGetMappings(dataStreamName), false);
        verifyResolvability(
            dataStreamName,
            client().admin()
                .indices()
                .prepareUpdateSettings(dataStreamName)
                .setSettings(Settings.builder().put("index.number_of_replicas", 0)),
            false
        );
        verifyResolvability(dataStreamName, client().admin().indices().prepareGetSettings(dataStreamName), false);
        verifyResolvability(dataStreamName, client().admin().cluster().prepareHealth(dataStreamName), false);
        verifyResolvability(dataStreamName, client().admin().cluster().prepareState().setIndices(dataStreamName), false);
        verifyResolvability(dataStreamName, client().prepareFieldCaps(dataStreamName).setFields("*"), false);
        verifyResolvability(dataStreamName, client().admin().indices().prepareGetIndex().addIndices(dataStreamName), false);
        verifyResolvability(dataStreamName, client().admin().indices().prepareOpen(dataStreamName), false);
        verifyResolvability(dataStreamName, client().admin().indices().prepareClose(dataStreamName), true);
        verifyResolvability(aliasToDataStream, client().admin().indices().prepareClose(aliasToDataStream), true);
        verifyResolvability(dataStreamName, client().admin().cluster().prepareSearchShards(dataStreamName), false);
        verifyResolvability(dataStreamName, client().admin().indices().prepareShardStores(dataStreamName), false);
        request = new CreateDataStreamAction.Request("logs-barbaz");
        client().execute(CreateDataStreamAction.INSTANCE, request).actionGet();
        verifyResolvability(
            "logs-barbaz",
            client().prepareIndex("logs-barbaz")
                .setSource("{\"@timestamp\": \"2020-12-12\"}", XContentType.JSON)
                .setOpType(DocWriteRequest.OpType.CREATE),
            false
        );
        String wildcardExpression = "logs*";