Update Ruff to 0.16.8

[AlexWaygood]

Update Ruff to 0.16.8, disabling its new RUF036 rule to avoid reordering existing unions and suppressing its new RUF068 rule where stubs mirror duplicate entries in reportlab's and workalendar's runtime __all__ tuples.

This is one of the dependencies that was updated in #16459.

Prepared with Codex.

[github-actions]

According to mypy_primer, this change has no effect on the checked open source code. 🤖🎉

[srittau]

@AlexWaygood Did you have a look at the instances flagged by RUF036? Is that something we should work towards fixing (I personally like that rule) or are there a significant amount of instances where fixing it would be detrimental? In the former case, we should leave a TODO comment and open an issue.

[AlexWaygood]

@AlexWaygood Did you have a look at the instances flagged by RUF036? Is that something we should work towards fixing (I personally like that rule) or are there a significant amount of instances where fixing it would be detrimental? In the former case, we should leave a TODO comment and open an issue.

Ugh, sorry, my PR description is terrible here. I should have checked the prose that codex wrote for me more carefully. I'm sorry 😞

I also think we should enable RUF036. I just wanted to separate enabling it into a standalone PR, since the diff is huge if we enable it here, and it makes it hard to spot the other changes being made here.

[srittau]

I just wanted to separate enabling it into a standalone PR

I agree that that makes sense.

[AlexWaygood]

#16477 for the followup