[Caffe2][easy] Avoid spurious vector copy in TransposeOp (#64403)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/64403
No need to copy to the heap here.
ghstack-source-id: 138033019
Test Plan: CI
Reviewed By: smacke
Differential Revision: D30712506
fbshipit-source-id: 5f4131b2569ebb1f5092262aaddb17215dea88f1
