Add ML associated indices (elastic#69492)

ML's associated indices somehow got dropped from the initial Feature States PR, so this
commit adds them again.

build.gradle

@@ -6,6 +6,7 @@
  * Side Public License, v 1.
  */
 
+
 import com.avast.gradle.dockercompose.tasks.ComposePull
 import com.github.jengelman.gradle.plugins.shadow.ShadowPlugin
 import de.thetaphi.forbiddenapis.gradle.ForbiddenApisPlugin
@@ -16,11 +17,12 @@ import org.elasticsearch.gradle.VersionProperties
 import org.elasticsearch.gradle.info.BuildParams
 import org.elasticsearch.gradle.plugin.PluginBuildPlugin
 import org.gradle.plugins.ide.eclipse.model.AccessRule
+import org.gradle.plugins.ide.eclipse.model.ProjectDependency
 import org.gradle.plugins.ide.eclipse.model.SourceFolder
 import org.gradle.util.DistributionLocator
 import org.gradle.util.GradleVersion
+
 import static org.elasticsearch.gradle.util.GradleUtils.maybeConfigure
-import org.gradle.plugins.ide.eclipse.model.ProjectDependency
 
 plugins {
   id 'lifecycle-base'

x-pack/plugin/ml/src/main/java/org/elasticsearch/xpack/ml/MachineLearning.java

@@ -72,6 +72,7 @@
 import org.elasticsearch.xpack.core.ml.MachineLearningField;
 import org.elasticsearch.xpack.core.ml.MlConfigIndex;
 import org.elasticsearch.xpack.core.ml.MlMetaIndex;
+import org.elasticsearch.xpack.core.ml.MlStatsIndex;
 import org.elasticsearch.xpack.core.ml.action.CloseJobAction;
 import org.elasticsearch.xpack.core.ml.action.DeleteCalendarAction;
 import org.elasticsearch.xpack.core.ml.action.DeleteCalendarEventAction;
@@ -142,7 +143,6 @@
 import org.elasticsearch.xpack.core.ml.inference.MlInferenceNamedXContentProvider;
 import org.elasticsearch.xpack.core.ml.inference.persistence.InferenceIndexConstants;
 import org.elasticsearch.xpack.core.ml.job.persistence.AnomalyDetectorsIndex;
-import org.elasticsearch.xpack.core.ml.job.persistence.AnomalyDetectorsIndexFields;
 import org.elasticsearch.xpack.core.ml.notifications.NotificationsIndex;
 import org.elasticsearch.xpack.core.template.TemplateUtils;
 import org.elasticsearch.xpack.ml.action.TransportCloseJobAction;
@@ -343,6 +343,8 @@
 import static java.util.Collections.emptyList;
 import static java.util.Collections.singletonList;
 import static org.elasticsearch.xpack.core.ClientHelper.ML_ORIGIN;
+import static org.elasticsearch.xpack.core.ml.job.persistence.AnomalyDetectorsIndexFields.RESULTS_INDEX_PREFIX;
+import static org.elasticsearch.xpack.core.ml.job.persistence.AnomalyDetectorsIndexFields.STATE_INDEX_PREFIX;
 
 public class MachineLearning extends Plugin implements SystemIndexPlugin,
                                                        AnalysisPlugin,
@@ -1074,7 +1076,7 @@ public static boolean allTemplatesInstalled(ClusterState clusterState) {
         List<String> templateNames =
             Arrays.asList(
                 NotificationsIndex.NOTIFICATIONS_INDEX,
-                AnomalyDetectorsIndexFields.STATE_INDEX_PREFIX,
+                STATE_INDEX_PREFIX,
                 AnomalyDetectorsIndex.jobResultsIndexPrefix());
         for (String templateName : templateNames) {
             allPresent = allPresent && TemplateUtils.checkTemplateExistsAndVersionIsGTECurrentVersion(templateName, clusterState);
@@ -1156,6 +1158,17 @@ public static SystemIndexDescriptor getInferenceIndexSecurityDescriptor() {
             .build();
     }
 
+    @Override
+    public Collection<String> getAssociatedIndexPatterns() {
+        return org.elasticsearch.common.collect.List.of(
+            RESULTS_INDEX_PREFIX + "*",
+            STATE_INDEX_PREFIX + "*",
+            MlStatsIndex.indexPattern(),
+            ".ml-notifications*",
+            ".ml-annotations*"
+        );
+    }
+
     @Override
     public String getFeatureName() {
         return "machine_learning";