ci: Make downstream customizations easier
- ci: Use $OSNAME instead of hardcoding apertis
- ci: Take the git committer info from the current CI user
- ci: Use a more generic message for the automated commit
- ci: Update the vendor file from update-base-file
- origins/apertis: Update bugtracker URL
- ci: Make update-base-files easier to customize
Edited by Emanuele Aina