Removing the __init__.py makes it impossible for Pylint to get the sources
to lint from the root folder. We manually set all the paths pylint will lint.
That's not a big deal, as we'll remove Pylint any soon to rely only on ruff.
I took inspiration from marsha or magnify project.
I removed the now useless bash script to run Pylint command. It saves us
wrapper! Plus, having a lint command running with different option locally
and in the CI was quite a pain.
Locally linter was running on diff files; Fixed! CI and make command has now
the same behavior.
d406f31bd8