Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/4277>
Uses some various combinations of the gdctl commands that configures the available monitors differently. Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/4190>
Test is ref test like, with gdctl outputs being compared. Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/4190>