Add regression test for ONNX exports of modules that embed an Embedding layer inside a Sequential (#32598)
Summary:
Fixes https://github.com/pytorch/pytorch/issues/19227
This PR adds a regression test for ONNX exports where a module has a sequential that references an Embedding layer
Pull Request resolved: https://github.com/pytorch/pytorch/pull/32598
Reviewed By: izdeby
Differential Revision: D22672790
Pulled By: ezyang
fbshipit-source-id: c88beb29a36b07378c28b0e4546efe887fcbc3be
