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
RoleDescriptor rd = new RoleDescriptor("anonymous_user_role", null, null, null);
                return Collections.singleton(rd);
            }
            return Collections.emptySet();
        }).when(fileRolesStore).roleDescriptors(anySet());
        doAnswer((invocationOnMock) -> {
            @SuppressWarnings("unchecked")
            ActionListener<RoleRetrievalResult> callback = (ActionListener<RoleRetrievalResult>) invocationOnMock.getArguments()[1];
            callback.onResponse(RoleRetrievalResult.failure(new RuntimeException("intentionally failed!")));
            return null;
        }).when(nativeRolesStore).getRoleDescriptors(isASet(), anyActionListener());
        final ReservedRolesStore reservedRolesStore = spy(new ReservedRolesStore());
        final CompositeRolesStore compositeRolesStore = buildCompositeRolesStore(
            settings,
            fileRolesStore,
            nativeRolesStore,
            reservedRolesStore,
            mock(NativePrivilegeStore.class),
            null,
            mock(ApiKeyService.class),
            mock(ServiceAccountService.class),
            null,
            null
        );
        verify(fileRolesStore).addListener(anyConsumer()); 
        PlainActionFuture<Role> rolesFuture = new PlainActionFuture<>();
        final User user = new User("no role user");
        Subject subject = new Subject(user, new RealmRef("name", "type", "node"));
        compositeRolesStore.getRole(subject, rolesFuture);
        final Role roles = rolesFuture.actionGet();