Default `data_streams.auto_sharding.excludes` to NO exclusions (`[]`) (#107091)

modules/data-streams/src/internalClusterTest/java/org/elasticsearch/datastreams/DataStreamAutoshardingIT.java

@@ -84,7 +84,6 @@ public class DataStreamAutoshardingIT extends ESIntegTestCase {
     public void configureClusterSettings() {
         updateClusterSettings(
             Settings.builder()
-                .putList(DataStreamAutoShardingService.DATA_STREAMS_AUTO_SHARDING_EXCLUDES_SETTING.getKey(), List.of())
                 // we want to manually trigger the rollovers in this test suite to be able to assert incrementally the changes in shard
                 // configurations
                 .put(DataStreamLifecycleService.DATA_STREAM_LIFECYCLE_POLL_INTERVAL, "30d")
@@ -93,11 +92,7 @@ public class DataStreamAutoshardingIT extends ESIntegTestCase {
 
     @After
     public void resetClusterSetting() {
-        updateClusterSettings(
-            Settings.builder()
-                .putNull(DataStreamAutoShardingService.DATA_STREAMS_AUTO_SHARDING_EXCLUDES_SETTING.getKey())
-                .putNull(DataStreamLifecycleService.DATA_STREAM_LIFECYCLE_POLL_INTERVAL)
-        );
+        updateClusterSettings(Settings.builder().putNull(DataStreamLifecycleService.DATA_STREAM_LIFECYCLE_POLL_INTERVAL));
     }
 
     public void testRolloverOnAutoShardCondition() throws Exception {

server/src/main/java/org/elasticsearch/action/datastreams/autosharding/DataStreamAutoShardingService.java

@@ -46,7 +46,7 @@ public class DataStreamAutoShardingService {
 
     public static final Setting<List<String>> DATA_STREAMS_AUTO_SHARDING_EXCLUDES_SETTING = Setting.listSetting(
         "data_streams.auto_sharding.excludes",
-        List.of("*"),
+        List.of(),
         Function.identity(),
         Setting.Property.Dynamic,
         Setting.Property.NodeScope

server/src/test/java/org/elasticsearch/action/datastreams/autosharding/DataStreamAutoShardingServiceTests.java

@@ -77,10 +77,7 @@ public class DataStreamAutoShardingServiceTests extends ESTestCase {
         clusterService = createClusterService(threadPool, clusterSettings);
         now = System.currentTimeMillis();
         service = new DataStreamAutoShardingService(
-            Settings.builder()
-                .put(DataStreamAutoShardingService.DATA_STREAMS_AUTO_SHARDING_ENABLED, true)
-                .putList(DataStreamAutoShardingService.DATA_STREAMS_AUTO_SHARDING_EXCLUDES_SETTING.getKey(), List.of())
-                .build(),
+            Settings.builder().put(DataStreamAutoShardingService.DATA_STREAMS_AUTO_SHARDING_ENABLED, true).build(),
             clusterService,
             new FeatureService(List.of(new FeatureSpecification() {
                 @Override
@@ -147,10 +144,7 @@ public class DataStreamAutoShardingServiceTests extends ESTestCase {
             ClusterState stateNoFeature = ClusterState.builder(ClusterName.DEFAULT).metadata(Metadata.builder()).build();
 
             DataStreamAutoShardingService noFeatureService = new DataStreamAutoShardingService(
-                Settings.builder()
-                    .put(DataStreamAutoShardingService.DATA_STREAMS_AUTO_SHARDING_ENABLED, true)
-                    .putList(DataStreamAutoShardingService.DATA_STREAMS_AUTO_SHARDING_EXCLUDES_SETTING.getKey(), List.of())
-                    .build(),
+                Settings.builder().put(DataStreamAutoShardingService.DATA_STREAMS_AUTO_SHARDING_ENABLED, true).build(),
                 clusterService,
                 new FeatureService(List.of()),
                 () -> now