[quant][graphmode][fx] Test to make sure dequantize node are placed properly (#47332)
Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/47332
Test Plan: Imported from OSS
Reviewed By: supriyar
Differential Revision: D24719736
fbshipit-source-id: 51b1f14b479edbc5d7f28d85920faf5fee8dd5ea
