User lifecycle: ignore SID when moving from preserved to staged
    
    When a preserved user entry is moved to staged state, the SID
    attribute must not be provided to user-stage command (the option
    does not exist and the SID will be re-generated anyway).
    
    Related: https://pagure.io/freeipa/issue/8995
    Signed-off-by: Florence Blanc-Renaud <flo@redhat.com>
    Reviewed-By: Christian Heimes <cheimes@redhat.com>
    Reviewed-By: Rob Crittenden <rcritten@redhat.com>
    Reviewed-By: Alexander Bokovoy <abokovoy@redhat.com>