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
getKibanaPrivileges.application("kibana-.kibana-sales");
        GetPrivilegesRequest getApmPrivileges = new GetPrivilegesRequest();
        getApmPrivileges.application("apm");
        assertThat(kibanaRole.cluster().check(GetPrivilegesAction.NAME, getKibanaPrivileges, authentication), is(true));
        assertThat(kibanaRole.cluster().check(GetPrivilegesAction.NAME, getApmPrivileges, authentication), is(false));
        PutPrivilegesRequest putKibanaPrivileges = new PutPrivilegesRequest();
        putKibanaPrivileges.setPrivileges(
            Collections.singletonList(
                new ApplicationPrivilegeDescriptor(
                    "kibana-.kibana-" + randomAlphaOfLengthBetween(2, 6),
                    "all",
                    Collections.emptySet(),
                    Collections.emptyMap()
                )
            )
        );
        PutPrivilegesRequest putSwiftypePrivileges = new PutPrivilegesRequest();
        putSwiftypePrivileges.setPrivileges(
            Collections.singletonList(
                new ApplicationPrivilegeDescriptor("swiftype-kibana", "all", Collections.emptySet(), Collections.emptyMap())
            )
        );
        assertThat(kibanaRole.cluster().check(PutPrivilegesAction.NAME, putKibanaPrivileges, authentication), is(true));
        assertThat(kibanaRole.cluster().check(PutPrivilegesAction.NAME, putSwiftypePrivileges, authentication), is(false));
        assertThat(kibanaRole.cluster().check(GetBuiltinPrivilegesAction.NAME, request, authentication), is(true));
        
        assertThat(kibanaRole.cluster().check(GetProfilesAction.NAME, request, authentication), is(true));
        assertThat(kibanaRole.cluster().check(ActivateProfileAction.NAME, request, authentication), is(true));
        assertThat(kibanaRole.cluster().check(SuggestProfilesAction.NAME, request, authentication), is(true));
        assertThat(kibanaRole.cluster().check(ProfileHasPrivilegesAction.NAME, request, authentication), is(true));