[Executorch][XNNPACK] Quantized Max Pool 2d (#99587)
Adding support for Quantized Max Pool 2d
Additions:
- Add quantized max pool 2d to executorch backend config
- modify max pool node visitors to grab quant params from input/output
- Add qmaxpool 2d patterns for partitioners
Differential Revision: [D44977783](https://our.internmc.facebook.com/intern/diff/D44977783/)
Pull Request resolved: https://github.com/pytorch/pytorch/pull/99587
Approved by: https://github.com/jerryzh168
