GHA: add print_tests_stats step to MacOS workflow (#68669)
Summary:
This will allow trunk CI to print test stats and upload stats (test reports, flaky tests, failed tests) to
- Scribe
- S3
- RDS
Pull Request resolved: https://github.com/pytorch/pytorch/pull/68669
Reviewed By: dagitses
Differential Revision: D32578169
Pulled By: janeyx99
fbshipit-source-id: c348e2070402754789f462b52cd71411984102e2
