This comes with a subtle behavioural change that we no longer
pass --nogpgcheck for upgrade tests, but we didn't really *mean*
to do that for anything but Rawhide, and it *shouldn't* be
necessary for Rawhide now, so let's see if everything is fine
without it.
Signed-off-by: Adam Williamson <awilliam@redhat.com>
This PR builds on some elements of the current upgrade process,
such as upgrade_boot, upgrade_preinstall, upgrade_postinstall, but
replaces the upgrade_run with graphical_upgrade_run to use graphical
methods to upgrade the system.
This would not be possible without necessary settings, that are
performed by graphical_upgrade_prerequisites.
Works for both Gnome and KDE.
