Update cockpit autoupdate test for new dnf5 service
    
    The service cockpit enables is different when it detects dnf5,
    since cockpit 317. Let's just make this an F40/F41 boundary
    thing, and add the cockpit 317 update as a workaround for F41
    until it goes stable.
    
    Signed-off-by: Adam Williamson <awilliam@redhat.com>