[NNC] Fix BufHandle arguments in loopnest python API (#59348)
Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/59348
Test Plan: Imported from OSS
Reviewed By: ZolotukhinM
Differential Revision: D28854233
Pulled By: huiguoo
fbshipit-source-id: 2484249992903ed7af0de504ac27f96f30e993d1
