Fix CI for Fedora 41 (dnf 5)
    
    See https://pagure.io/fedora-project-config/issue/340 and
    https://github.com/ansible/ansible/issues/84206 . We need to
    force install python3-libdnf5 or ansible can't manage packages.
    
    Signed-off-by: Adam Williamson <awilliam@redhat.com>