[Security Solution][Entity Analytics][Privileged User Monitoring] Add Privileged User Monitoring index in the Reserved roles store. (elastic#134619)

* Code changes to add Privileged User Monitoring index in the Reserved roles store.

* Fixing compilation errors

* Adding tests relevant to changes in ReservedRolesStore

Author: abhishekbhatia1710

x-pack/plugin/core/src/main/java/org/elasticsearch/xpack/core/security/authz/store/ReservedRolesStore.java

@@ -79,6 +79,7 @@ public class ReservedRolesStore implements BiConsumer<Set<String>, ActionListene
     public static final String ENTITY_STORE_V1_LATEST_INDEX = ".entities.v1.latest.security_*";
     public static final String ENTITY_STORE_HISTORY_INDEX = ".entities.*.history.*";
     public static final String ASSET_CRITICALITY_INDEX = ".asset-criticality.asset-criticality-*";
+    public static final String PRIVILEGED_USER_MONITORING_INDEX = ".entity_analytics.monitoring*";
 
     /** Index pattern for Universal Profiling */
     public static final String UNIVERSAL_PROFILING_ALIASES = "profiling-*";
@@ -781,8 +782,9 @@ private static RoleDescriptor buildViewerRoleDescriptor() {
                         ReservedRolesStore.LISTS_INDEX_REINDEXED_V8,
                         ReservedRolesStore.LISTS_ITEMS_INDEX_REINDEXED_V8,
                         ReservedRolesStore.ENTITY_STORE_V1_LATEST_INDEX,
-                        ReservedRolesStore.ENTITY_STORE_HISTORY_INDEX,
-                        ReservedRolesStore.ASSET_CRITICALITY_INDEX
+                        ReservedRolesStore.ASSET_CRITICALITY_INDEX,
+                        ReservedRolesStore.PRIVILEGED_USER_MONITORING_INDEX,
+                        ReservedRolesStore.ENTITY_STORE_HISTORY_INDEX
                     )
                     .privileges("read", "view_index_metadata")
                     .build(),
@@ -851,7 +853,11 @@ private static RoleDescriptor buildEditorRoleDescriptor() {
                     .build(),
                 // Security - Entity Store is view only
                 RoleDescriptor.IndicesPrivileges.builder()
-                    .indices(ReservedRolesStore.ENTITY_STORE_V1_LATEST_INDEX, ReservedRolesStore.ENTITY_STORE_HISTORY_INDEX)
+                    .indices(
+                        ReservedRolesStore.ENTITY_STORE_V1_LATEST_INDEX,
+                        ReservedRolesStore.PRIVILEGED_USER_MONITORING_INDEX,
+                        ReservedRolesStore.ENTITY_STORE_HISTORY_INDEX
+                    )
                     .privileges("read", "view_index_metadata")
                     .build(),
                 // Alerts-as-data

x-pack/plugin/core/src/test/java/org/elasticsearch/xpack/core/security/authz/store/ReservedRolesStoreTests.java

@@ -3815,6 +3815,7 @@ public void testPredefinedViewerRole() {
 
         assertOnlyReadAllowed(role, ".entities.v1.latest.security_" + randomIntBetween(0, 5));
         assertOnlyReadAllowed(role, ".asset-criticality.asset-criticality-" + randomIntBetween(0, 5));
+        assertOnlyReadAllowed(role, ".entity_analytics.monitoring" + randomIntBetween(0, 5));
 
         assertOnlyReadAllowed(role, ".slo-observability." + randomIntBetween(0, 5));
         assertViewIndexMetadata(role, ".slo-observability." + randomIntBetween(0, 5));
@@ -3887,6 +3888,7 @@ public void testPredefinedEditorRole() {
         assertOnlyReadAllowed(role, "profiling-" + randomIntBetween(0, 5));
         assertOnlyReadAllowed(role, ".profiling-" + randomIntBetween(0, 5));
         assertOnlyReadAllowed(role, ".entities.v1.latest.security_" + randomIntBetween(0, 5));
+        assertOnlyReadAllowed(role, ".entity_analytics.monitoring" + randomIntBetween(0, 5));
         assertOnlyReadAllowed(role, randomAlphaOfLength(5));
 
         assertReadWriteDocsAndMaintenanceButNotDeleteIndexAllowed(role, ".siem-signals-" + randomIntBetween(0, 5));