
So far, the tests relied on the host system to provide pipewire and wireplumber. This seperates the tests from the host system which is especially useful if the tests are run in a toolbox which has a different pipewire installed than the host. It also should make it harder to have a mismatch between the pipewire library and the pipewire daemon. Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/3966>