centos-kde-common: Manually specify deps for kde-desktop-environment group
    
    This works around an issue where the EPEL composition groups are
    being processed during the compose process in such a way that
    the base CentOS group dependencies specified are being silently
    dropped, which leads to groups that don't work correctly and
    create broken images.
    
    Hopefully, we won't have to keep this fix around forever...
    
    Reference: https://pagure.io/releng/issue/10228