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
.build()
            )
        );
        indices = new ArrayList<>(2);
        indices.add("apache-2016-12");
        indices.add("apache-2017-01");
        Collections.shuffle(indices, random());
        privileges = new ArrayList<>(3);
        privileges.add("create");
        privileges.add("create_doc");
        privileges.add("index");
        Collections.shuffle(privileges, random());
        response = hasPrivileges(
            IndicesPrivileges.builder().indices(indices).privileges(privileges).allowRestrictedIndices(randomBoolean()).build(),
            authzInfo,
            Collections.emptyList(),
            Strings.EMPTY_ARRAY
        );
        assertThat(response.allChecksSuccess(), is(true));
        assertThat(response.getDetails().index().values(), Matchers.iterableWithSize(2));
        assertThat(
            response.getDetails().index().values(),
            containsInAnyOrder(
                ResourcePrivileges.builder("apache-2016-12")
                    .addPrivileges(
                        MapBuilder.newMapBuilder(new TreeMap<String, Boolean>())
                            .put("create_doc", true)
                            .put("create", true)
                            .put("index", true)
                            .map()