90-default.preset: Enable rpm-ostree count me by default
    
    Remove the ostree-counting subpackage and generalize the logic now that
    all rpm-ostree variants enable counting by default.
    
    This is only effectively enabled if rpm-ostree is installed by default
    and the timer includes a startup contion to make sure the system is
    managed by rpm-ostree.
    
    Both of those conditions are true only on rpm-ostree based variants
    (IoT, CoreOS, Silverblue/Kinoite).
    
    See: https://bugzilla.redhat.com/show_bug.cgi?id=1995495