CI: some improvements to switch some jobs to v2.x
Some of the jobs could use (and benefit from using) v2.0 images, and some probably v2.1 images which have pyenv and a set of different python versions.
A brief maintenance was performed on this instance on 2025-01-13 between 22:15 and 22:30 UTC+2.
Some of the jobs could use (and benefit from using) v2.0 images, and some probably v2.1 images which have pyenv and a set of different python versions.