Bugfix: Adding dot prefix to entity analytics system indices (elastic#127558)

Author: tiansivive

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

@@ -510,7 +510,7 @@ static RoleDescriptor kibanaSystem(String name) {
                     .build(),
                 // security entity analytics indices
                 RoleDescriptor.IndicesPrivileges.builder().indices("risk-score.risk-*").privileges("all").build(),
-                RoleDescriptor.IndicesPrivileges.builder().indices("entity_analytics.*").privileges("all").build(),
+                RoleDescriptor.IndicesPrivileges.builder().indices(".entity_analytics.*").privileges("all").build(),
                 RoleDescriptor.IndicesPrivileges.builder()
                     .indices(".asset-criticality.asset-criticality-*")
                     .privileges("create_index", "manage", "read", "write")