[FFe] Migrate to pipewire-0.3

[Marco Trevisan (Treviño)]

Various packages are now depending on pipewire-0.3 (or, in some cases pipewire-0.2).

While this is not a main component for ubuntu (yet) we have various projects depending on it, and some core components (actually mutter) have a build-only-dependency on it.

Debian already completed this migration some weeks ago, while ubuntu doesn't provide pipewire-0.3 yet and this can be blocking many components to land in next cycle.

As per this, we thought that was wiser to anticipate the migration now so that all the dependencies will be already in ubuntu at the beginning of the next cycle, and we could start earlier the actual usage of pipewire in the desktop for mutter (and other components such as the xdg-portals).

All the packages have been prepared already in:
 https://launchpad.net/~ci-train-ppa-service/+archive/ubuntu/4265.1/+packages

You can refer to the diffs in https://bileto.ubuntu.com/#/ticket/4265 to see the details of the changes.

[Marco Trevisan (Treviño) (3v1n0)]

Given that the changes include xdg-desktop-portal implementations, it's fair to underline that snaps using them have been tested successfully, and no regression has been reported so far.

[Rik Mills (rikmills)]

The next major release of KDE Plasma will want pipewire 0.3, so this would put us in good shape for that next cycle.

[Iain Lane (laney)]

Yeah, makes sense. Happy to approve this.