[quant][graphmode] refactor nodeQuantizable (#33171)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/33171
For better code reuse
Test Plan:
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Imported from OSS
Differential Revision: D20087845
fbshipit-source-id: f88cffb410bd54a1b3f937786104f46bcd1190d3
