ubports-qa upgrades only the packages related to the PR/MR repo

[Fuseteam]

appearently you can upgrade a specific package by apt installing it

this assumes the package name is the same as the repository name, we may need a more robust way to read the correct package name

[mardy]

Added a few remarks, but I also would prefer if this were implemented in python (I'm also fine if the whole script gets rewritten in bash, but this hybrid is not very nice IMHO) :-)

[mardy]

This should be remove, I guess?

[Fuseteam]

no actually, we're not really removing packages, we're downgrading packages. originally we were running apt full-upgrade here too
pkginstall will not and should not install something that isn't installed already

i have updated de logs to reflect this

[Fuseteam]

Added a few remarks, but I also would prefer if this were implemented in python (I'm also fine if the whole script gets rewritten in bash, but this hybrid is not very nice IMHO) :-)

i don't mind reimplementing it in python fwiw, this was just the easiest way to get something working, as i don't know as much python

actually, after submitting this PR i attempted to reimplement pkgremove in python but appearently python's os.check_output quotes the list of packages breaking apt