Let torch.futures.wait_all re-throw errors (#40291)
Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/40291
Test Plan: Imported from OSS
Differential Revision: D22141702
Pulled By: mrshenli
fbshipit-source-id: 50b5e5c687e87930aef3a50cc40839729a4eb9c6
