[vulkan] tentative fix for conv2d_pw, and fix checks for addmm (#47723)
Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/47723
Test Plan: Imported from OSS
Reviewed By: AshkanAliabadi
Differential Revision: D24878293
Pulled By: SS-JIA
fbshipit-source-id: 04abb544b87bd047ffe8af7ed52ec2569c61add4
