Adds torch.* API section for TorchScript Lang Ref (#53236)
Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/53236
Reviewed By: SplitInfinity
Differential Revision: D27526584
Pulled By: gmagogsfm
fbshipit-source-id: ea931ea63aa4b37a7782935a1760bebffedc5b67
