[rpc][jit] support remote call in TorchScript (#43046)
Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/43046
Test Plan: Imported from OSS
Reviewed By: mrshenli
Differential Revision: D23621108
Pulled By: wanchaol
fbshipit-source-id: e8152c6cdd3831f32d72d46ac86ce22f3f13c651
