Checkout repo to support release tag validation (astral-sh#5238)

## Summary

The
[release](https://github.com/astral-sh/ruff/actions/runs/5329340068/jobs/9655224008)
failed due to an inability to find `pyproject.toml`. This PR moves that
validation into its own step (so we can fail fast) and ensures we clone
the repo.

Bump version to 0.0.273 (astral-sh#5218)

Generate one fix per statement for flake8-type-checking rules (astral…

…-sh#4915)

Change `iteration-over-set` to flag set literals only (astral-sh#4907)

Testing Macros: Add `extra-traits` feature (astral-sh#4643)

Bump version to 0.0.269 (astral-sh#4506)