Make sure our packages don't conflict with EPEL backports
    
    In Hyperscale, systemd-boot and systemd-timesyncd are provided by
    systemd-udev so let's make sure that we don't have conflicts when
    installing Hyperscale on a systemd with either of these packages
    installed by conflicting/obsoleting/providing these packages from
    systemd-udev.
    
    Similarly, let's make sure epel-rpm-macros-systemd doesn't conflict
    with rpm-macros-systemd using the same approach.
    
    To make sure we can merge the previous networkd package fixes into
    the c9s branch, we make it conditional on the stream version we're
    building for.