[quant][graphmode] Support stack (#42187)
Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/42187
Test Plan: Imported from OSS
Reviewed By: vkuzo
Differential Revision: D22801229
fbshipit-source-id: 7d1758c4fb1c8f742a275c3a631605f0f0d08e44
