Add OpInfos for combinations, cartesian_prod, sum_to_size, ldexp, as_strided (#68853)
Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/68853
Reviewed By: davidberard98
Differential Revision: D32811147
Pulled By: saketh-are
fbshipit-source-id: 941dcf949072f8d10faf4d5a0fa0ef409ac6a7db
