[PyTorch][Edge] Tests for QuantizationFx API on lite modules (#60476)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/60476
# Context
Add tests for Lite modules that are quantized using fx API
Read this posts for details about why we need a test bench for quantized lite modules
https://fb.workplace.com/groups/2322282031156145/permalink/4289792691071726/
https://github.com/pytorch/pytorch/pull/60226#discussion_r654615851
moved common code to `caffe2/torch/testing/_internal/common_quantization.py`
ghstack-source-id: 133144292
Test Plan:
```
~/fbsource/fbcode] buck test caffe2/test:fx_quantization_lite
Downloaded 0/2 artifacts, 0.00 bytes, 100.0% cache miss
Building: finished in 8.3 sec (100%) 11892/11892 jobs, 2 updated
Total time: 8.6 sec
More details at https://www.internalfb.com/intern/buck/build/ffb7d517-d85e-4c8f-9531-5e5d9ca1d34c
Tpx test run coordinator for Facebook. See https://fburl.com/tpx for details.
Running with tpx session id: d79a5713-bd29-4bbf-ae76-33a413869a09
Trace available for this run at /tmp/tpx-20210630-105547.675980/trace.log
Started reporting to test run: https://www.internalfb.com/intern/testinfra/testrun/3096224749578707
✓ ListingSuccess: caffe2/test:fx_quantization_lite - main (9.423)
✓ Pass: caffe2/test:fx_quantization_lite - test_embedding (mobile.test_quantize_fx_lite_script_module.TestFuseFx) (10.630)
✓ Pass: caffe2/test:fx_quantization_lite - test_submodule (mobile.test_quantize_fx_lite_script_module.TestFuseFx) (12.464)
✓ Pass: caffe2/test:fx_quantization_lite - test_conv2d (mobile.test_quantize_fx_lite_script_module.TestFuseFx) (12.728)
Summary
Pass: 3
ListingSuccess: 1
If you need help understanding your runs, please follow the wiki: https://fburl.com/posting_in_tpx_users
Finished test run: https://www.internalfb.com/intern/testinfra/testrun/3096224749578707
```
Reviewed By: iseeyuan
Differential Revision: D29306402
fbshipit-source-id: aa481e0f696b7e9b04b9dcc6516e8a390f7dc1be
