[Quant] Add int8 linear op impl for quantization PT2E with Inductor. input is an int8 CPU tensor; weight is an int8 MdkldnnCPU tensor. (#105818)
**Summary**
Add a new onednn qlinear op for quantization PT2E with Inductor. input is an int8 CPU tensor and weight is an int8 MkldnnCPU tensor.
**Test plan**
python test/test_quantization.py -k test_qlinear_pt2e
Pull Request resolved: https://github.com/pytorch/pytorch/pull/105818
Approved by: https://github.com/jgong5, https://github.com/leslie-fang-intel, https://github.com/jerryzh168
