[iOS] Disable depthwise3x3_winograd on iOS (#39591)
Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/39591
Test Plan: Imported from OSS
Differential Revision: D21908298
Pulled By: xta0
fbshipit-source-id: 2b67909f34ca1d3ff0bed9ff6875e0ba2ae3b98e
