Inconsistent naming of aidge attributes

Some operator attributes does not respect snake convention:

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• BitShift

Proposition

Fix found error + add unit test in python to test snake case convention is respected for every operator attributes.

added UI 🎮 Unit-test 🧪 labels

assigned to @cmoineau

@gregkub @hrouis @noamzerah FYI

changed title from Inconsistent use of aidge attributes to Inconsistent naming of aidge attributes

mentioned in merge request !333 (merged)

added StatusReview Ready label

closed

removed StatusReview Ready label