[rpc] Wrap exception creation with try/catch (#87224)
Sometimes, we cannot recreate the exception with only string (for example if it is a custom exception type). Ideal situation would be to carry over all details on how to recreate the remote end's exception and throw that on client, but for now, we raise a RuntimeError with the original error msg when we cannot reconstruct.
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Differential Revision: [D40353274](https://our.internmc.facebook.com/intern/diff/D40353274/)
Pull Request resolved: https://github.com/pytorch/pytorch/pull/87224
Approved by: https://github.com/fduwjj
