4c6216e8a3
The test makes sure the YCbCr formats create the expected image and we don't accidentally break it. Like all wayland tests, this is now part of mutter/wayland, mutter/tty, and mutter/kvm and will use either shm or dma-buf depending on which suite is chosen. Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/3371>