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/core/src/test/java/org/elasticsearch/xpack/core/security/authz/store/ReservedRolesStoreTests.java
final String allowedApplicationActionPattern = "example/custom/action/*";
        final String kibanaApplicationWithRandomIndex = "kibana-" + randomFrom(randomAlphaOfLengthBetween(8, 24), ".kibana");
        Role role = Role.buildFromRoleDescriptor(
            roleDescriptor,
            new FieldPermissionsCache(Settings.EMPTY),
            RESTRICTED_INDICES,
            List.of(
                new ApplicationPrivilegeDescriptor(
                    kibanaApplicationWithRandomIndex,
                    "reserved_ml_admin",
                    Set.of(allowedApplicationActionPattern),
                    Map.of()
                )
            )
        );
        assertRoleHasManageMl(role);
        assertThat(role.cluster().check(DelegatePkiAuthenticationAction.NAME, request, authentication), is(false));
        assertThat(role.runAs().check(randomAlphaOfLengthBetween(1, 30)), is(false));
        assertNoAccessAllowed(role, "foo");
        assertNoAccessAllowed(role, MlConfigIndex.indexName()); 
        assertOnlyReadAllowed(role, MlMetaIndex.indexName());
        assertOnlyReadAllowed(role, AnomalyDetectorsIndexFields.STATE_INDEX_PREFIX);
        assertOnlyReadAllowed(role, AnomalyDetectorsIndexFields.RESULTS_INDEX_PREFIX + AnomalyDetectorsIndexFields.RESULTS_INDEX_DEFAULT);
        assertOnlyReadAllowed(role, NotificationsIndex.NOTIFICATIONS_INDEX);
        assertReadWriteDocsButNotDeleteIndexAllowed(role, AnnotationIndex.LATEST_INDEX_NAME);
        assertNoAccessAllowed(role, TestRestrictedIndices.SAMPLE_RESTRICTED_NAMES);
        assertNoAccessAllowed(role, XPackPlugin.ASYNC_RESULTS_INDEX + randomAlphaOfLengthBetween(0, 2));
        assertThat(
            role.application().grants(ApplicationPrivilegeTests.createPrivilege(kibanaApplicationWithRandomIndex, "app-foo", "foo"), "*"),
            is(false)