ignore and clear not ready errors (#61554)
Summary:
Follow-up to https://github.com/pytorch/pytorch/issues/18584. This PR covers the remaining places where event or stream query might result in not ready errors.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/61554
Reviewed By: mrshenli
Differential Revision: D29763973
Pulled By: ezyang
fbshipit-source-id: 41d988d1826b2309cc6b01a81144094b353abdf9
