move PT2 exclusion to CI script (#1955)
Summary:
Allow people to use the run.py script to run PT2 still, only exclude for CI
Pull Request resolved: https://github.com/pytorch/benchmark/pull/1955
Reviewed By: xuzhao9
Differential Revision: D49869088
Pulled By: janeyx99
fbshipit-source-id: 82534d4520f9f6b016df6d62ef971abf16b9678e
