Upgrade ruff to 0.8.0

[DimitriPapadopoulos]

Removal of six deprecated rules

Six rules have been removed in this release. We realized that the changes they were asking users to make to their code were either unnecessary or outright undesirable:

• missing-type-self (ANN101) and missing-type-cls (ANN102) have both been removed from our flake8-annotations category. Both have been deprecated since Ruff 0.2.0.
• pytest-missing-fixture-name-underscore (PT004) and pytest-incorrect-fixture-name-underscore (PT005) have both been removed from our flake8-pytest-style category. Both have been deprecated since Ruff 0.6.0.
• unpacked-list-comprehension (UP027) has been removed from our pyupgrade category. It's been deprecated since Ruff 0.6.0
• E999, deprecated in Ruff 0.5.0, has been removed as an error code. Syntax errors are now always reported and cannot be suppressed.

Rule stabilizations

The following 13 rules have been stabilized and are no longer in preview:
[...]

• unsorted-dunder-all (RUF022)
• unsorted-dunder-slots (RUF023)

Other behavior changes

This release also improves the behavior of several other rules.
[...]

• printf-string-formatting (UP031) now reports all printf-like usages in your code. Previously, violations were only reported if an autofix was available.