Force all multilib packages to build inside a mock chroot

[korewaChino]

Anda does not implement a forcearch mechanism yet, so every multilib package needs to still be built inside a mock container for it to actually output i686 builds

[korewaChino]

ok we probably want to remove gamescope-legacy at this point since gamescope now works kind of properly on GCN4 GPUs now

[raboneko]

💔 All backports failed

Status	Branch	Result
❌	f40	Backport failed because of merge conflicts You might need to backport the following PRs to f40: - feat(ci): add mock label to ci, also remove multilib (#2863)
❌	f41	Backport failed because of merge conflicts You might need to backport the following PRs to f41: - add subrepo label (#2893) - Clean up the mesa spec file (#2857) - feat(ci): add mock label to ci, also remove multilib (#2863) - feat: rename terra-mesa to mesa because it's literally in terra-extras (#2528)

Manual backport

To create the backport manually run:

backport --pr 2941

Questions ?

Please refer to the Backport tool documentation and see the Github Action logs for details