[Quant][Inductor] Enable quantized conv weight prepack inside inductor constant folding (#104581)
**Summary**
Enable quantization conv weight prepack inside inductor constant folding.
**Test Plan**
```
python -m pytest test_mkldnn_pattern_matcher.py -k test_qconv2d_unary
```
Pull Request resolved: https://github.com/pytorch/pytorch/pull/104581
Approved by: https://github.com/jgong5, https://github.com/eellison
ghstack dependencies: #104580
