[quant][pt2e] Add reference representation rewrite for statically quantized linear (#107994)
Summary: att
Test Plan:
```
python test/test_quantization.py TestQuantizePT2E.test_representation_linear
buck2 test 'fbcodemode/opt' fbcodecaffe2/test:quantization_pt2e -- 'test_representation_linear'
```
Reviewed By: kimishpatel
Differential Revision: D48674862
Pull Request resolved: https://github.com/pytorch/pytorch/pull/107994
Approved by: https://github.com/mcr229, https://github.com/guangy10
