Force LLVM Compilation for CPU Tests (#46949)
Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/46949
Test Plan: Imported from OSS
Reviewed By: ansley
Differential Revision: D24805247
Pulled By: eellison
fbshipit-source-id: 4fcaf02d8a78cc5cbcbde36940d0a2c85fba3fc5
