[NNC] added more python bindings for loopnest (#56213)
Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/56213
Test Plan: Imported from OSS
Reviewed By: navahgar
Differential Revision: D27809000
Pulled By: huiguoo
fbshipit-source-id: 013a1ae74397650a958c4fdcd39b38a3c0ff17ef
