Move QScheme ops to c10 (#30134)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/30134
ghstack-source-id: 95055387
Test Plan: buck build mode/dev caffe2:generate-code
Differential Revision: D18609716
fbshipit-source-id: fec39359e0b97387a9b13f8179d72a731cc61808
