Revert "ci: Speed up pylint GitHub Action"

[cclauss]

Reverts #5828

• Reverts ci: Speed up pylint GitHub Action #5828 which worked OK in a pull request but generated pylint import errors when merged to main. @masci

[masci]

I skimmed through the recent jobs but I couldn't find failures, before we merge this let me try debugging the job, maybe we're just missing a handful dependencies and we don't need to install all

[cclauss]

https://github.com/deepset-ai/haystack/actions/runs/6219591285/job/16877952196

Run pylint -ry -j 0 haystack/preview/components/embedders/openai_text_embedder.py
************* Module haystack.preview.components.embedders.openai_text_embedder
haystack/preview/components/embedders/openai_text_embedder.py:4:0: E0401: Unable to import 'openai' (import-error)

There will be others...

[masci]

My bad, for some reason I was looking at mypy, yeah the pylint error is not fixable, we need the dependencies to be there and I don't see an easy way to only install what's needed for a certain PR. Let's revert.