[RPC Framework] Add _script_module_reducer unconditionally for RecursiveScriptModule in RPC pickler (#58020)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/58020
Previously there is no RPC pickler for `RecursiveScriptModule`. Although it is a subclass of `ScriptModule`, the reducer of `ScriptModule` is not triggered for `RecursiveScriptModule` when a script remote module is sent over RPC.
This PR checkpoints the investigation of #58274, which makes sure that a RPC pickler is invoked here. This still cannot fix `test_send_remote_module_over_the_wire_script`. Will revisit this bug once there is a feature request from users.
ghstack-source-id: 128949642
Test Plan:
TODO: re-enable these tests
buck test mode/dev-nosan caffe2/test/distributed/rpc:process_group_agent -- test_send_remote_module_over_the_wire_script
buck test mode/dev-nosan caffe2/test/distributed/rpc:process_group_agent -- test_remote_module_py_pickle_not_supported_script
Reviewed By: rohan-varma
Differential Revision: D28346758
fbshipit-source-id: 3cff84ca665da03da6ed6acb094a1f594fcd945e
