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
assertThat(monitoringUserRole.indices().allowedIndicesMatcher(DeleteAction.NAME).test(mockIndexAbstraction(index)), is(false));
        assertThat(
            monitoringUserRole.indices().allowedIndicesMatcher(UpdateSettingsAction.NAME).test(mockIndexAbstraction(index)),
            is(false)
        );
        assertThat(monitoringUserRole.indices().allowedIndicesMatcher(SearchAction.NAME).test(mockIndexAbstraction(index)), is(true));
        assertThat(monitoringUserRole.indices().allowedIndicesMatcher(GetAction.NAME).test(mockIndexAbstraction(index)), is(true));
        assertThat(monitoringUserRole.indices().allowedIndicesMatcher(READ_CROSS_CLUSTER_NAME).test(mockIndexAbstraction(index)), is(true));
        assertNoAccessAllowed(monitoringUserRole, TestRestrictedIndices.SAMPLE_RESTRICTED_NAMES);
        assertNoAccessAllowed(monitoringUserRole, XPackPlugin.ASYNC_RESULTS_INDEX + randomAlphaOfLengthBetween(0, 2));
        assertThat(
            monitoringUserRole.application()
                .grants(ApplicationPrivilegeTests.createPrivilege(kibanaApplicationWithRandomIndex, "app-foo", "foo"), "*"),
            is(false)
        );
        assertThat(
            monitoringUserRole.application()
                .grants(
                    ApplicationPrivilegeTests.createPrivilege(
                        kibanaApplicationWithRandomIndex,
                        "app-reserved_monitoring",
                        allowedApplicationActionPattern
                    ),
                    "*"
                ),
            is(true)
        );
        final String otherApplication = "logstash-" + randomAlphaOfLengthBetween(8, 24);
        assertThat(
            monitoringUserRole.application().grants(ApplicationPrivilegeTests.createPrivilege(otherApplication, "app-foo", "foo"), "*"),