Fixes booting to a black screen when using gamescope-autologin under GNOME
This workaround was written to explicitly use KWin and doesn't seem to be an
issue anyway. Exclude from GNOME images and leave in place for KDE images
* fix: Stop caching flatpaks
These take up way too much space in images
* fix(flatpak-system-install): Require network connection
* fix(flatpak-system-install): Restart on failure
* fix(gnome): Add Silverblue flatpaks to install list
* fix(flatpak-system-install): Silence errors on package removal
A package may not be removed for a number of reasons, for example if someone were
to rebase from Kinoite to Bazzite GNOME, they wouldn't have the GNOME app suite
installed from Silverblue
* fix(deck): Don't try to install cached system flatpaks
