Auto merge of #159642 - Kobzol:bootstrap-pgo-clippy, r=Mark-Simulacrum

Optimize Clippy with PGO



After rustdoc and Cargo, this seemed like an obvious target for PGO.

Perf results: https://perf.rust-lang.org/compare.html?start=390279b302ca98ae270f434100ae3730531d1246&end=caf67342a544d6eab7a40ebf0d02e802f62008a4&stat=instructions:u

- [Quick try build that doesn't optimize Clippy](https://github.com/rust-lang/rust/pull/159642#issuecomment-5048108388)
- [Full try build that optimizes Clippy](https://github.com/rust-lang/rust/pull/159642#issuecomment-5045782105)