ipatest: remove xfail from test_smb
    
    test_smb is now successful because the windows server version
    has been updated to windows-server-2022 with
    - KB5012170
    - KB5025230
    - KB5022507
    - servicing stack 10.0.20348.1663
    in freeipa-pr-ci commit 3ba4151.
    
    Remove the xfail.
    
    Fixes: https://pagure.io/freeipa/issue/9124
    Signed-off-by: Florence Blanc-Renaud <flo@redhat.com>
    Reviewed-By: Mohammad Rizwan <myusuf@redhat.com>