[quant][graphmode][fx][test] Add per op test for graph mode quant on fx (#43229)
Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/43229
Test Plan: Imported from OSS
Reviewed By: supriyar
Differential Revision: D23201692
fbshipit-source-id: 37fa54dcf0a9d5029f1101e11bfd4ca45b422641
