[Quant] Add a guard against shapes for qnnpack qadd (#71219)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/71219
qnnpack kernel does not support broadcasting
Test Plan: buck test caffe2/test:quantization
Reviewed By: kimishpatel
Differential Revision: D33520613
fbshipit-source-id: 93c5226d53cb7b90ed495ff7b14158f7171d25bf
