Apply clang-format to RPC files (#34139)
Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/34139
Test Plan: Imported from OSS
Differential Revision: D20227342
Pulled By: mrshenli
fbshipit-source-id: 01b478bde1f6a51f69eb5277fa90ba6ac2d4b5dc
