`extract-translation-source-files` performance concerns

[sarina]

[post-prototype, this needs to be given attention]

I’m concerned about runtime if every single repo in the matrix needs to install gettext and set up python. do you know what runtime limit is for github actions?

I’m wondering if there are some steps we can figure out how to run only once, like installing packages, setting git configuration, etc

(I don’t rightly know and maybe github actions can run a really long time)