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
assertThat(response.allChecksSuccess(), is(false));
        assertThat(response.getDetails().index().values(), Matchers.iterableWithSize(8));
        assertThat(
            response.getDetails().index().values(),
            containsInAnyOrder(
                ResourcePrivileges.builder("logstash-2016-*").addPrivileges(Collections.singletonMap("write", true)).build(),
                ResourcePrivileges.builder("logstash-*").addPrivileges(Collections.singletonMap("read", true)).build(),
                ResourcePrivileges.builder("log*").addPrivileges(Collections.singletonMap("manage", false)).build(),
                ResourcePrivileges.builder("foo?").addPrivileges(Collections.singletonMap("read", true)).build(),
                ResourcePrivileges.builder("foo*").addPrivileges(Collections.singletonMap("read", false)).build(),
                ResourcePrivileges.builder("abcd*").addPrivileges(mapBuilder().put("read", true).put("write", false).map()).build(),
                ResourcePrivileges.builder("abc*xyz")
                    .addPrivileges(mapBuilder().put("read", true).put("write", true).put("manage", false).map())
                    .build(),
                ResourcePrivileges.builder("a*xyz")
                    .addPrivileges(mapBuilder().put("read", false).put("write", true).put("manage", false).map())
                    .build()
            )
        );
        assertThat(response.getDetails().application().entrySet(), Matchers.iterableWithSize(1));
        final Collection<ResourcePrivileges> kibanaPrivileges = response.getDetails().application().get("kibana");
        assertThat(kibanaPrivileges, Matchers.iterableWithSize(3));
        assertThat(
            Strings.collectionToCommaDelimitedString(kibanaPrivileges),
            kibanaPrivileges,
            containsInAnyOrder(
                ResourcePrivileges.builder("*").addPrivileges(mapBuilder().put("read", true).put("write", false).map()).build(),
                ResourcePrivileges.builder("space/engineering/project-*")
                    .addPrivileges(Collections.singletonMap("space:view/dashboard", true))
                    .build(),