This diff removes the `codegen-grpc` yarn command from the native. We are removed the C++ gRPC from the client and the compilation of the gRPC files will be handled by the cargo building process. Also, we are removing running this command from the documentation.
Linear task: [[ https://linear.app/comm/issue/ENG-2276/removing-grpc-c-library-on-android-pod-patch-on-ios-and-related-code | ENG-2276 ]]