Add type annotations to torch.nn.modules.padding (#49494)
Summary:
Closes gh-49492
Pull Request resolved: https://github.com/pytorch/pytorch/pull/49494
Reviewed By: mruberry
Differential Revision: D25723837
Pulled By: walterddr
fbshipit-source-id: 92af0100f6d9e2bb25b259f5a7fe9d449ffb6443
