buildserver: strip extraneous packages installed by Vagrant base box
In the contributors instances VM we can see that file
is installed by some other programs:
vagrant@bullseye:~$ apt-cache rdepends --installed file
file
Reverse Depends:
reportbug
python3-reportbug
mailcap
libmagic1
cloud-image-utils
...yielding strange results when the same recipes are run in the CI (and presumably the build server), eg. https://gitlab.com/licaon-kter/fdroiddata/-/jobs/3216959943#L1404 and suddenly these fail since they needed file