Streamline app/desktop translation

[tobiasKaminsky]

Can we move
https://github.com/nextcloud/docker-ci/tree/master/translations-app
and
https://github.com/nextcloud/docker-ci/tree/master/translations-desktop

to /translations again?

I think this helps to maintain it in future

[nickvergessen]

That breaks the image names? Or at least the building routines?

[tobiasKaminsky]

Not directly:
translations-app / dockerfile would then be tranlations / dockerfile-app and "-app" suffix
So name could be the same.

We then could also combine apps, app, ios, plain, etc.
Not sure why we split this up in first place, if all have same dockerfile, but "only" shell-script differ.

This then would prevent us to build 10 different images…