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
SECURITY_ENABLED_SETTINGS,
            null,
            null,
            null,
            null,
            null,
            null,
            null,
            null,
            null
        );
        final Subject subject = new Subject(internalUser, new RealmRef("__attach", "__attach", randomAlphaOfLength(8)));
        final Role role = compositeRolesStore.tryGetRoleForInternalUser(subject);
        assertThat("Role for " + subject, role, notNullValue());
        return role;
    }
    private CompositeRolesStore buildCompositeRolesStore(
        Settings settings,
        @Nullable FileRolesStore fileRolesStore,
        @Nullable NativeRolesStore nativeRolesStore,
        @Nullable ReservedRolesStore reservedRolesStore,
        @Nullable NativePrivilegeStore privilegeStore,
        @Nullable XPackLicenseState licenseState,
        @Nullable ApiKeyService apiKeyService,
        @Nullable ServiceAccountService serviceAccountService,
        @Nullable DocumentSubsetBitsetCache documentSubsetBitsetCache,
        @Nullable Consumer<Collection<RoleDescriptor>> roleConsumer
    ) {
        return buildCompositeRolesStore(
            settings,