Port leaky_relu to structured (#57621)
Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/57621
Test Plan: Imported from OSS
Reviewed By: VitalyFedyunin
Differential Revision: D28224706
Pulled By: ezyang
fbshipit-source-id: 168b175d0fd9e0cc3335ea00df4c7967fea77819
