avg_pool3d: port to structured (#59083)
Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/59083
Test Plan: Imported from OSS
Reviewed By: ngimel
Differential Revision: D28802620
Pulled By: ezyang
fbshipit-source-id: 1e890af3c37912447198aa2f20914b99decda8b2
