Rename Arkindex URL and remove some obsolete Arkindex related requirements in unit tests

Closes #152 (closed)

I also noticed that we were still mocking requests to Arkindex while none of the code makes any. I removed the related pytest plugin (pytest-responses) and the fixture from tox.ini

changed milestone to %ML Prod - Summer 2023

added P3 Quick Win + 1 deleted label

assigned to @yschneider

added 4 commits

• 13cc75b9...d38bab3e - 3 commits from branch main
• 306eb589 - rename Arkindex URL and remove some obsolete Arkindex related requirements in unit tests

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requested review from @mboillet

approved this merge request

merged