[quant][graphmode] Different rule for add/add_/mul/mul_ (#38667)
Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/38667
Test Plan: Imported from OSS
Differential Revision: D21633555
fbshipit-source-id: 03b0298e83bf4dbda41b048c0edc7bb92cd4e1df
