Fix type annotations for torch.sparse, enable in CI (#43108)
Summary:
Closes gh-42982
Pull Request resolved: https://github.com/pytorch/pytorch/pull/43108
Reviewed By: malfet
Differential Revision: D23167560
Pulled By: ezyang
fbshipit-source-id: 0d660ca686ada2347bf440c6349551d1539f99ef
