Fix __torch_function__ tests. (#54492)
Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/54492
Test Plan: Imported from OSS
Reviewed By: ailzhang
Differential Revision: D27292567
Pulled By: ezyang
fbshipit-source-id: dc29daea967c6d8aaf63bdbcb4aff0bb13d7a5f7
