When resolving a user's roles, if there are any roles that depend on DLS/FLS, and that is not permitted by the current license, we skip them.
https://github.com/elastic/elasticsearch/blob/f435488484ec844962d49371b8917c135fe6f714/x-pack/plugin/security/src/main/java/org/elasticsearch/xpack/security/authz/store/CompositeRolesStore.java#L188-L192

However, we do not perform any logging in this circumstance, and rely on the user discovering that their roles are missing.

We should
1. Add a `WARN` log message
2. Add a Warning header

when this occurs. 
x-pack/plugin/security/src/test/java/org/elasticsearch/xpack/security/authz/store/CompositeRolesStoreTests.java
doCallRealMethod().when(fileRolesStore).accept(anySet(), anyActionListener());
        ReservedRolesStore reservedRolesStore = mock(ReservedRolesStore.class);
        doCallRealMethod().when(reservedRolesStore).accept(anySet(), anyActionListener());
        NativeRolesStore nativeRolesStore = mock(NativeRolesStore.class);
        doCallRealMethod().when(nativeRolesStore).accept(anySet(), anyActionListener());
        CompositeRolesStore compositeRolesStore = buildCompositeRolesStore(
            Settings.EMPTY,
            fileRolesStore,
            nativeRolesStore,
            reservedRolesStore,
            null,
            null,
            null,
            null,
            null,
            null,
            null,
            store -> numInvalidation.incrementAndGet()
        );
        int expectedInvalidation = 0;
        
        SecurityIndexManager.State previousState = dummyState(randomFrom(ClusterHealthStatus.GREEN, ClusterHealthStatus.YELLOW));
        SecurityIndexManager.State currentState = dummyState(null);
        compositeRolesStore.onSecurityIndexStateChange(previousState, currentState);
        assertEquals(++expectedInvalidation, numInvalidation.get());
        
        previousState = dummyState(null);
        currentState = dummyState(randomFrom(ClusterHealthStatus.GREEN, ClusterHealthStatus.YELLOW));
        compositeRolesStore.onSecurityIndexStateChange(previousState, currentState);
        assertEquals(++expectedInvalidation, numInvalidation.get());