This looks to have just started failing in our release builds on the 15th. This is normally due to feature flags and some capability toggled off when in release mode.

**Build scan:**
https://gradle-enterprise.elastic.co/s/ffnazi2aagnz6/tests/:modules:data-streams:test/org.elasticsearch.datastreams.action.GetDataStreamsResponseTests/testResponseIlmAndDataStreamLifecycleRepresentation


**Reproduction line:**
```
./gradlew ':modules:data-streams:test' --tests "org.elasticsearch.datastreams.action.GetDataStreamsResponseTests.testResponseIlmAndDataStreamLifecycleRepresentation" -Dtests.seed=9284F1971381D42F -Dbuild.snapshot=false -Dtests.jvm.argline="-Dbuild.snapshot=false" -Dtests.locale=sr-Latn-ME -Dtests.timezone=Etc/GMT+2 -Druntime.java=21
```

**Applicable branches:**
main

**Reproduces locally?:**
Yes

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


**Failure excerpt:**
```
java.lang.NullPointerException: Cannot invoke "java.util.List.get(int)" because "failureStoresRepresentation" is null

  at __randomizedtesting.SeedInfo.seed([9284F1971381D42F:AE19FC0FE8A3DFC8]:0)
  at org.elasticsearch.datastreams.action.GetDataStreamsResponseTests.testResponseIlmAndDataStreamLifecycleRepresentation(GetDataStreamsResponseTests.java:170)
  at jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
  at java.lang.reflect.Method.invoke(Method.java:580)
  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:48)
  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:1583)

```
modules/data-streams/src/test/java/org/elasticsearch/datastreams/action/GetDataStreamsResponseTests.java
import org.elasticsearch.xcontent.json.JsonXContent;
import java.time.Instant;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import static org.elasticsearch.cluster.metadata.DataStream.getDefaultBackingIndexName;
import static org.elasticsearch.cluster.metadata.DataStream.getDefaultFailureStoreName;
import static org.hamcrest.Matchers.is;
import static org.hamcrest.Matchers.nullValue;
public class GetDataStreamsResponseTests extends AbstractWireSerializingTestCase<Response> {
    @Override
    protected Writeable.Reader<Response> instanceReader() {
        return Response::new;
    }
    @Override
    protected Response createTestInstance() {
        int numDataStreams = randomIntBetween(0, 8);
        List<Response.DataStreamInfo> dataStreams = new ArrayList<>();
        for (int i = 0; i < numDataStreams; i++) {
            dataStreams.add(generateRandomDataStreamInfo());
        }
        return new Response(dataStreams);
    }
    @Override
    protected Response mutateInstance(Response instance) {
        if (instance.getDataStreams().isEmpty()) {
            return new Response(List.of(generateRandomDataStreamInfo()));
        }
        return new Response(instance.getDataStreams().stream().map(this::mutateInstance).toList());