Comment 1 for bug 1912498

All branches ready for review, attaching debdiff for review of the ubuntu-meta package changes as well - would appreciate some feedback.

It's worth mentioning the status for hirsute. So basically in hirsute and groovy we only use the seeds for the raspi desktop images. In hirsute, with as things are right now, adding it would be hard as we'd be generating a lot of component mismatches due to pulling things from restricted, universe etc. It's a problem conceptually and for migration reasons, but for a stable series like focal it's less so. Especially that since ages we've been building raspi images from universe + multiverse packages anyway, so it's already 'bad'.