[Quant][PT2E] Enable X86InductorQuantizer single quantizable op(maxpool2d) (#105639)
**Summary**
In this PR, we mainly enable 2 things.
- Enable the skeleton of quantization recipe for single quantizable operators in `X86InductorQuantizer`.
- Add quantization recipe of `maxpool2d` and annotate it as input./output share observer.
**Test Plan**
```
python -m pytest test_x86inductor_quantizer.py -k test_maxpool2d_recipe
```
Pull Request resolved: https://github.com/pytorch/pytorch/pull/105639
Approved by: https://github.com/jgong5, https://github.com/jerryzh168
ghstack dependencies: #104580, #104581, #104588, #104590, #105455, #105456
