[quant][pt2e][xnnpack_quantizer] Add support for mul and mul_relu (#107930)
Summary: att
Test Plan: buck2 run executorch/examples/quantization:example -- -m=mv3 --verify
Differential Revision: D48588121
Pull Request resolved: https://github.com/pytorch/pytorch/pull/107930
Approved by: https://github.com/kimishpatel
