Support RRefs that contain torch.cuda.Event (#61354)
Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/61354
Test Plan: Imported from OSS
Reviewed By: iramazanli
Differential Revision: D29617155
Pulled By: pbelevich
fbshipit-source-id: 6e56b3fd0a0f93ecec048b58c90f2a47b4cba688
