Implement 'to' on ScriptModules (#15340)
Summary:
Following #6008
Fixes "Implement 'to' on ScriptModules #7354"
cc zdevito
Pull Request resolved: https://github.com/pytorch/pytorch/pull/15340
Differential Revision: D13506646
Pulled By: zdevito
fbshipit-source-id: 318fea2e8e51a37ce9844efa4c8db67d45a66317
