Update torch.distributed.DistBackendError type (#89235)
Summary: Update torch.distributed.DistBackendError type based on https://fb.workplace.com/groups/pyreqa/posts/5753993921357059
Test Plan:
Pyre tests should pass?
let sandcastle run
Reviewed By: markkm
Differential Revision: D41384130
Pull Request resolved: https://github.com/pytorch/pytorch/pull/89235
Approved by: https://github.com/awgu
