Exclude undefined tensors in the result of Module::parameters() / named_paramters() / buffers() / named_buffers() (#30626)
Summary:
PR https://github.com/pytorch/pytorch/pull/30523 attempted to fix https://github.com/pytorch/pytorch/issues/30508 and https://github.com/pytorch/pytorch/issues/30462, but the fix wasn't complete. This PR makes the following improvements:
1. Fixes https://github.com/pytorch/pytorch/issues/30508 and https://github.com/pytorch/pytorch/issues/30462 properly by excluding undefined tensors in the result of `Module::parameters()` / `named_parameters()` / `buffers()` / `named_buffers()`, which mirrors the Python API behavior.
2. Audits all use sites of `Module::parameters_` / `buffers_` and change them to `Module::named_parameters(/*recurse=*/false)` / `named_buffers(/*recurse=*/false)` when appropriate, so that use sites of module parameters / buffers never need to worry about undefined tensors.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/30626
Differential Revision: D18777507
Pulled By: yf225
fbshipit-source-id: 55b64b69779e1186342efd3c44857f416334ed6b
