Revert the server-side accountEnabled base filter from #34165 which
broke the group members endpoint. Filter disabled users client-side
in both the /users and group members paths. Restore the mutual
exclusivity check between userFilter and userGroupMemberFilter.
Fixes#34422
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Signed-off-by: Fredrik Adelöw <freben@gmail.com>