Summary:
- Remove local version identifier from build versioning
- Use CPU-only instances for CPU-only tests

Pull Request resolved: https://github.com/pytorch/FBGEMM/pull/1631

Reviewed By: shintaro-iwasaki

Differential Revision: D43915104

Pulled By: q10

fbshipit-source-id: 223845c1c38d911f650d5db926aa7f2f59561b85