Do not chown files inside docker for pytorch-job-tests (#41884)
Summary:
They are already owned by `jenkins` user after the build
Pull Request resolved: https://github.com/pytorch/pytorch/pull/41884
Reviewed By: orionr
Differential Revision: D22682441
Pulled By: malfet
fbshipit-source-id: daf99532d300d30a5de591ad03af4597e145fdfc
