State dict serialization of nnq.Linear (#24047)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/24047
Add `_{save_to,load_from}_state_dict` methods to `nnq.Linear` that explicitly deal with conversions from the Python attributes to the serialized state dict form
Test Plan: Imported from OSS
Reviewed By: driazati
Differential Revision: D16728346
Pulled By: jamesr66a
fbshipit-source-id: 182c9f5069d509147dc9020b341b6cb87505fe7f
