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
.privileges("read") 
                    .build(),
                IndicesPrivileges.builder()
                    .indices("abcd*")
                    .privileges("read", "write") 
                    .build(),
                IndicesPrivileges.builder()
                    .indices("abc*xyz")
                    .privileges("read", "write", "manage") 
                    .build(),
                IndicesPrivileges.builder()
                    .indices("a*xyz")
                    .privileges("read", "write", "manage") 
                    .build() },
            new ApplicationResourcePrivileges[] {
                ApplicationResourcePrivileges.builder()
                    .resources("*")
                    .application("kibana")
                    .privileges(Sets.union(kibanaRead.name(), kibanaWrite.name())) 
                    .build(),
                ApplicationResourcePrivileges.builder()
                    .resources("space/engineering/project-*", "space/*") 
                    .application("kibana")
                    .privileges("space:view/dashboard")
                    .build() },
            authzInfo,
            privs,
            new String[0]
        );
        assertThat(response, notNullValue());