Enable Ruff flake8-builtins (A)

[Avasam]

Ref #13295
flake8-builtins (A)

• A001-A004 should definitely be disabled in our stubs
• A005 is already disabled in stubs.
• A006 should never happen in stubs since there shouldn't be any lambda.
• See flake8-builtins (A) rules that shouldn't apply to stubs astral-sh/ruff#15293 for more details

At that point, it' easier and more concise to disable the entire group in stubs.

So this group would only apply to our tests/scripts.

[srittau]

It's a meh rule, in my opinion, considering that Python built-ins block quite a few important names (filter, id, dir), but I don't mind.

[AlexWaygood]

it's a bit pedantic for sure, but this one seems reasonable to me. The recommendations from this rule are never going to tell you to do something that's actually incorrect, unlike e.g. #13728 (where the more correct thing arguably does sometimes contradict the rule's recommendation)