upgrade: Run configuration upgrade under empty ccache collection
    
    Use temporary empty DIR-based ccache collection to prevent upgrade
    failures in case KCM: or KEYRING: ccache type is used by default in
    krb5.conf and is not available. We don't need any user credentials
    during upgrade procedure but kadmin.local would attempt to resolve
    default ccache and if that's not available, kadmin.local will fail.
    
    Fixes: https://bugzilla.redhat.com/show_bug.cgi?id=1558818
    Signed-off-by: Alexander Bokovoy <abokovoy@redhat.com>
    Reviewed-By: Florence Blanc-Renaud <frenaud@redhat.com>