[quant][graphmode][fx][fp16] Add fp16 support for div (#52810)
Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/52810
Test Plan:
python test/test_quantization.py TestQuantizeFxOps.test_div
Imported from OSS
Reviewed By: vkuzo
Differential Revision: D26655620
fbshipit-source-id: e46cb895ba456e99e4433bd6037229b8248a1b28
