Ruff preview mode

[CoolCat467]

This pull request enables ruff's preview mode.

Currently a work in progress, but I wanted to see if I've messed anything up in the unit tests.

[jakkdl]

I think I'd vote weakly against using ruff preview.
If you just want to run CI checks it's enough to push to a branch in this repo, without opening a PR. (or even better run tests locally ofc)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 99.63%. Comparing base (6f614ec) to head (3eb8328).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3024      +/-   ##
==========================================
- Coverage   99.63%   99.63%   -0.01%     
==========================================
  Files         121      121              
  Lines       17850    17847       -3     
  Branches     3208     3205       -3     
==========================================
- Hits        17784    17781       -3     
  Misses         46       46              
  Partials       20       20              

Files	Coverage Δ
src/trio/_abc.py	100.00% <ø> (ø)
src/trio/_core/_entry_queue.py	100.00% <100.00%> (ø)
src/trio/_core/_run.py	99.38% <100.00%> (ø)
src/trio/_core/_tests/test_asyncgen.py	100.00% <100.00%> (ø)
src/trio/_core/_tests/test_exceptiongroup_gc.py	100.00% <100.00%> (ø)
src/trio/_core/_tests/test_guest_mode.py	100.00% <100.00%> (ø)
src/trio/_core/_tests/test_instrumentation.py	100.00% <100.00%> (ø)
src/trio/_core/_tests/test_io.py	100.00% <100.00%> (ø)
src/trio/_core/_tests/test_ki.py	97.83% <100.00%> (ø)
src/trio/_core/_tests/test_local.py	100.00% <100.00%> (ø)
... and 40 more

[CoolCat467]

hash argument fixes being merged in this should fix what caused previous ci runs to fail