consider reducing artifacts disk space usage in tpo/core/debian/tor

hi @weasel!

gitlab-02 has been running out of disk space lately and we have identified that the core tor Debian package builds are using a significant chunk of this (27.5 GB, about 10% of the disk usage).

we're looking to see if we can reduce artifacts retention in various projects (see #40615 (closed) for details). could you see if you could reduce that period in your .gitlab-ci.yml file?

alternatively, maybe reduce the frequency of the scheduled pipeliens. in particular I wonder why it's necessary to build the same tags (0.3.5, 0.4.5, 0.4.6) daily...

thanks!