[PyTorch Numeric Suite] Add module output comparison (#36701)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/36701
Add module output comparison API.
ghstack-source-id: 103368194
Test Plan: buck test mode/dev caffe2/test:quantization -- 'test_compare_model_outputs'
Differential Revision: D21053197
fbshipit-source-id: cabcafbeeac1b604db069833a0f17ebce506ba65
