Reduce RPC branches for Python/BuiltinOp/TorchScript (#32689)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/32689
As described in https://github.com/pytorch/pytorch/issues/32565
ghstack-source-id: 97440343
Test Plan:
```
buck test mode/dev-nosan //caffe2/test/distributed/rpc:rpc_fork -- test_script_functions_not_supported
buck build mode/dev-nosan //caffe2/test/distributed/rpc:rpc_fork
buck-out/gen/caffe2/test/distributed/rpc/rpc_fork\#binary.par -r test_script_functions_not_supported
```
```
buck test mode/dev-nosan //caffe2/test/distributed/rpc:dist_autograd_fork
buck build mode/dev-nosan //caffe2/test/distributed/rpc:dist_autograd_fork
buck-out/gen/caffe2/test/distributed/rpc/dist_autograd_fork\#binary.par -r test_backward_simple_script_call
```
Differential Revision: D5721814
fbshipit-source-id: 9079e81764be1e7c7b85dd72a18c76f3ecfd2547
