Migration plan from Zuul to Packit as dist-git CI runners

Final update for this thread.

We are moving with the disablement of Zuul for the src.fedoraproject.org/projects/rpms/* projects today.

Also as reminder, we will be disabling the Jenkins based Fedora CI (for PRs only) on 2026-02-16 1.

As usual, feel free to get in touch if this is creating any issues.