[ONNX] Add export of prim::dtype, prim::tolist (#46019)
Summary:
Add export of prim::dtype, prim::tolist.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/46019
Reviewed By: malfet
Differential Revision: D24870870
Pulled By: bzinodev
fbshipit-source-id: 7f59e2c8f5ac2dbf83c889c73bd61f96587a296e
