ipaclient: Remove --no-sssd and --no-ac options
    
    Client installation with --no-sssd option has already beeen deprecated
    with https://pagure.io/freeipa/issue/5860. Authconfig support has been
    removed, therefore --no-ac option can be removed also.
    
    ipatests/test_integration/test_authselect.py: Skip no_sssd and no_ac tests.
    
    See: https://pagure.io/freeipa/issue/7671
    Signed-off-by: Thomas Woerner <twoerner@redhat.com>
    Reviewed-By: Christian Heimes <cheimes@redhat.com>
    Reviewed-By: Alexander Bokovoy <abokovoy@redhat.com>