Enable PGO for Linux ARM64 Ruff releases (#27574)
## Summary
This PR enables PGO for Ruff's Linx ARM64 releases, following the
approach outlined in https://github.com/astral-sh/ruff/pull/27570. (To
enable PGO, we also move to a native ARM64 runner.)
As a result, `ruff check` gets 11.2% faster on the holdout set, `ruff
format` gets 8.6% faster, and the release binary gets 3.6% smaller.
