[quant][graph] Fix bug in replicateDequant (#37637)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/37637
Insert dequant op at specific offset, rather than for all inputs of user
Test Plan:
python test/test_quantization.py
Imported from OSS
Differential Revision: D21354931
fbshipit-source-id: 79a1dc63b0ed96c3d51d569116ed963106085d3b
