ipatests: update the xfail annotation for test_number_of_zones
    
    The test is failing on fedora 36+, update and simplify the
    xfail condition.
    
    Related: https://pagure.io/freeipa/issue/9135
    
    Signed-off-by: Florence Blanc-Renaud <flo@redhat.com>
    Reviewed-By: Mohammad Rizwan Yusuf <myusuf@redhat.com>