make python remote exception to rethrow when using remote reference to itself (#29930)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/29930
Right now, python call remote exception rethrown is coupled with deserializtiaon.
For owner ref, the setValue() and getValue() do not use serialization and deserialization, so when users create a ref to itself, and call ownerRef.to_here(), python call remote exception will not be rethrown.
This diff is to move remote exception rethrown out of deserialization, and exception can be handled for ownerRef.localValue() or ownerRef.to_here()
close #29924
ghstack-source-id: 94210894
Test Plan: unit tests
Differential Revision: D18541916
fbshipit-source-id: 7cda93f623d52c740b3c1b1fa9a442f866984340
