[quant][graphmode][fx] Add support for hardswish (#43374)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/43374
Porting op tests from test_quantize_jit.py
Test Plan:
TestQuantizeFxOps
Imported from OSS
Reviewed By: z-a-f
Differential Revision: D23257044
fbshipit-source-id: 2cdf12e104db6e51ffa0324eb602e68132a646ef
