[quant] Prep for conv_transpose packing (#39714)
Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/39714
Test Plan: Imported from OSS
Reviewed By: vkuzo
Differential Revision: D22087071
Pulled By: z-a-f
fbshipit-source-id: 507f8a414026eb4c9926f68c1e94d2f56119bca6
