Batching world-rebuilding changes for the core-updates-frozen branch

[Maxim Cournoyer]

Hello Guix!

Since there's going to be at least this change [0] causing a world
rebuild of the core-updates-frozen branch, I'd like to know if there are
other world-rebuilding but low-risk changes you'd like to see integrated
into the branch.

If you do, feel free to 'block' the 50358 issue with the changes, so
that I can review them and push them at the same time as [0].

Thank you!

Maxim

[0]  https://issues.guix.gnu.org/50358