[Quant][Inductor] Enable lowering of qcat (#106838)
**Summary**
Enable the lowering of `qcat` inside inductor as extern kernel.
**Test Plan**
```
python -m pytest test_mkldnn_pattern_matcher.py -k test_qcat
```
Pull Request resolved: https://github.com/pytorch/pytorch/pull/106838
Approved by: https://github.com/jgong5, https://github.com/eellison
ghstack dependencies: #106836
