Update ROCm CI to python3.6 (#23088)
Summary:
Rehash of https://github.com/pytorch/pytorch/issues/22322 .
Given that python 2.7 will be EOL'd on Jan 1, 2020 and we have models depending on python3.5+, we'd like to update the ROCm CI across the board to python3.6.
This PR adds the skip tests and some semantic changes for PyTorch.
Added pattern match skip for anything but the ROCm CI compared to #223222 for the python find step in the PyTorch build.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/23088
Differential Revision: D16448261
Pulled By: bddppq
fbshipit-source-id: 69ece1a213418d9abf1444c496dce1c190ee07c8
