Add OpInfo for torch.unique and torch.unique_consecutive (#67529)
Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/67529
Reviewed By: pbelevich
Differential Revision: D32045941
Pulled By: saketh-are
fbshipit-source-id: fefea1ddabcd3c4b40e9374b991410626437cdb4
