Add sdist tests for well-known downstream repositories #3718

Job	Run time
Check ${{ matrix.platform.target }}	0s
Generate Matrix	5s
Test Alpine Linux	0s
Test Auditwheel	0s
Test Cross Compile	0s
Test Docker	0s
Test Bootstrap (ubuntu-latest)	2m 7s
Test Bootstrap (macos-13)	2m 58s
Test Emscripten	0s
Test Bootstrap (windows-latest)	8m 42s
Test MSRV	1m 6s
Test Pyston	0s
Test downstream - ast-grep/ast-grep / sdist	2m 50s
Test downstream - astral-sh/ruff / sdist	5m 39s
Test downstream - crate-ci/typos / sdist	1m 42s
Test downstream - oxigraph/oxigraph / sdist	7m 26s
Test downstream - pola-rs/polars / sdist	22m 14s
Test (ubuntu-latest, 3.12)	13m 53s
Test (ubuntu-latest, pypy3.10)	8m 25s
Test (windows-latest, 3.12)	15m 43s
Test (windows-latest, pypy3.10)	41m 3s
conclusion	1s
	2h 13m 54s

Provide feedback