Fix ruff 0.16 findings; bump dependency minimums to match

- pyproject [tool.ruff.lint]: ignore RUF022/RUF023 (deliberately grouped
  __all__/__slots__), SIM117, BLE001 (blind except is intentional at
  CFFI callback boundaries)
- Legit fixes: dict/tuple instead of typing.Dict/Tuple in generate.py,
  unquoted annotations in raf.py, Self return for __enter__ methods,
  explicit check=False on subprocess.run, collapsed nested ifs, sorted
  test imports, unused-unpacked-variable in test_raises
- Bump minimum versions to the synced toolchain: cffi 2.1.1, ruff
  0.16.10, pytest 9.1.1, auditwheel 6.8.2, setuptools 84.0.0,
  setuptools-scm 10.3.4 (project deps and build-system requires)

tests/util.py

@@ -1,6 +1,5 @@
 import random
 
-
 _rng = random.SystemRandom()