Add TE fuser ops (#68825)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/68825
Factoring out the elementwise ops in tensorexpr fuser and adding their corresponding shape functions, since we need shape functions to fuse them with dynamic shapes
Test Plan: Imported from OSS
Reviewed By: samdow
Differential Revision: D32732466
Pulled By: eellison
fbshipit-source-id: 69cacf6fbed8eb97e475f5d55b2eec0384fe8ec1
