Enable macos clang-tidy installs (#62214)
Summary:
This PR enables installing our custom MacOS clang-tidy binaries. It also updates related documentation.
The binaries are produced by [this CI job](https://github.com/pytorch/test-infra/blob/master/.github/workflows/clang-tidy-macos.yml), and are published to S3.
This PR does not handle versioning of the downloaded binaries as this is being worked on separately. See https://github.com/pytorch/test-infra/issues/73
Pull Request resolved: https://github.com/pytorch/pytorch/pull/62214
Test Plan:
On a MacOS machine, run
```bash
python3 -m tools.linter.install.clang_tidy
.clang-tidy-bin/clang-tidy --checks="*" --list-checks | grep "misc-max-tokens"
```
Reviewed By: janeyx99, mruberry
Differential Revision: D29917728
Pulled By: 1ntEgr8
fbshipit-source-id: 98d0d8b7a57bdebf0ebcdc83228ef391e8c6629e
