[gnome-runtime-images] Non-fast-forward update to branch barthalion/ci-shared-runners

[Bartłomiej Piotrowski <bpiotrowski src gnome org>]

The branch 'barthalion/ci-shared-runners' was changed in a way that was not a fast-forward update.
NOTE: This may cause problems for people pulling from the branch. For more information,
please see:

 https://wiki.gnome.org/Git/Help/NonFastForward

Commits removed from the branch:

  0daa4e1... Drop privileged tag

Commits added to the branch:

  5cf2a58... Drop privileged tag