This drops some custom building of various components that are now up to
date. While at it, start using the FDO_DISTRIBUTION_PACKAGES variable to
install packages, as it with the bumped ci-templates version also
doesn't install weak dependencies.
This also requires tweaking the pipewire dead lock work arounds, as it
changed configuration file paths.
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1865>
With the surfaceless mode in the headless backend, it's now possible to
initiate the headless mode without any mode setting devices, or render
nodes, without any special CI runner privileges.
The native backend tests include screen cast tests, so make them
possible to run by starting pipewire. Testing shows that enabling audio
support (pulseaudio & jack compat layers) makes the tests dead lock and
eventually timeout, so disable those features for now.
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1698>
