Port `norm` kernel to structured kernels. (#62711)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/62711
Tracking issue: #55070
Test Plan: Imported from OSS
Reviewed By: anjali411
Differential Revision: D30109866
Pulled By: ezyang
fbshipit-source-id: 894c9496894d059c7690a174b75bbd4db7ed6016
