Port hardsigmoid_backward to strucutred (#58484)
Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/58484
Test Plan: Imported from OSS
Reviewed By: soulitzer
Differential Revision: D28572529
Pulled By: ezyang
fbshipit-source-id: aee125aa59a1f2b1ddb0c29a287097d866121379
