[reland][quant][graphmode][fx][fp16] Add fp16 support for {add|mul}{_relu} (#52714) (#53019)
Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/53019
Test Plan:
python test/test_quantization.py TestQuantizedOps.test_add
python test/test_quantization.py TestQuantizedOps.test_mul
python test/test_quantization.py TestQuantizedOps.test_add_relu
python test/test_quantization.py TestQuantizedOps.test_mul_relu
Imported from OSS
Imported from OSS
Reviewed By: vkuzo
Differential Revision: D26725350
fbshipit-source-id: 2a89f5da6a21908f454f870521d2a4549fdd291e
