Add a CI Job to Check BC Changes in Function Schemas (#26329)
Summary:
Ready for review, and results, please check https://circleci.com/gh/pytorch/pytorch/2827354?utm_campaign=vcs-integration-link&utm_medium=referral&utm_source=github-build-link
Also, an experimental PR stacked on this have caught bc-breaking changes introduced by it.
https://github.com/pytorch/pytorch/pull/26398
Pull Request resolved: https://github.com/pytorch/pytorch/pull/26329
Reviewed By: hl475
Differential Revision: D17485668
Pulled By: houseroad
fbshipit-source-id: b10682f1785a20ea04521992e0973b1380b4dd3b
