[GPU] Add an attribute to the torchscript model exported by metal (#47174)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/47174
As title
ghstack-source-id: 115747991
Test Plan: Sandcastle
Reviewed By: kimishpatel
Differential Revision: D24616430
fbshipit-source-id: 2ccd264688471788f0dfea8bdc234fa69d39817f
