Make the miopen handle part of ConvolutionParams (#16613)
Summary:
so that it's included in the hashed key that decides whether to call Find or not. This is required to ensure that Find is run for all devices
Pull Request resolved: https://github.com/pytorch/pytorch/pull/16613
Differential Revision: D13901769
Pulled By: bddppq
fbshipit-source-id: 7d29ea9e40231cd4eef80847afa1307efeb0945c
