[quant][graphmode][refactor] Simplify signature for insertObserverFor (#33274)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/33274
att
Test Plan:
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Imported from OSS
Differential Revision: D20123588
fbshipit-source-id: e656d96e0b6004bfcca5df2ab222184d4e1dd6ad
