Monitoring data can now be stored in `metrics-*` patterns when collected through elastic-agent. [Our documentation](https://www.elastic.co/guide/en/kibana/current/monitoring-data.html) recommends to use the `monitoring_user` role to view the data in Stack Monitoring application but that role does not have permissions to read from the metrics pattern.

`monitoring_user` should be allowed the same permissions on `metrics-*` as `.monitoring-*`
x-pack/plugin/security/src/test/java/org/elasticsearch/xpack/security/authz/RBACEngineTests.java
{
            final SimpleRole role = Role.buildFromRoleDescriptor(
                reservedRolesStore.roleDescriptor("superuser"),
                fieldPermissionsCache,
                RESTRICTED_INDICES
            );
            final RBACAuthorizationInfo authorizationInfo = mock(RBACAuthorizationInfo.class);
            when(authorizationInfo.getRole()).thenReturn(role);
            final PlainActionFuture<RoleDescriptorsIntersection> future = new PlainActionFuture<>();
            engine.getRoleDescriptorsIntersectionForRemoteCluster(randomAlphaOfLengthBetween(5, 20), authorizationInfo, future);
            assertThat(
                future.actionGet(),
                equalTo(
                    new RoleDescriptorsIntersection(
                        new RoleDescriptor(
                            Role.REMOTE_USER_ROLE_NAME,
                            null,
                            new IndicesPrivileges[] {
                                IndicesPrivileges.builder().indices("*").privileges("all").allowRestrictedIndices(false).build(),
                                IndicesPrivileges.builder()
                                    .indices("*")
                                    .privileges("monitor", "read", "read_cross_cluster", "view_index_metadata")
                                    .allowRestrictedIndices(true)
                                    .build() },
                            null,
                            null,
                            null,
                            null,
                            null
                        )