[quant][graph] Add quantizedmul_relu and quantized::mul_scalar_relu ops (#36844)
Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/36844
Test Plan:
python test/quantization/test_quantize_script.py TestQuantizeScriptPTSQOps.test_quantized_mul_relu
python test/quantization/test_quantize_script.py TestQuantizeScriptPTSQOps.test_quantized_mul_scalar_relu
Imported from OSS
Differential Revision: D21134440
fbshipit-source-id: 483fb30066cebf659b2f3be22c18d389c7972f81
