GHA: preserve downloaded JSONs as artifacts (#69258)
Summary:
Preserves the .json files in the test folder for every test job as an artifact.
Going to hud.pytorch.org/pr/69258 and downloading/unzipping any of the `test-jsons-*.zip` shows that .pytorch-slow-tests.json and .pytorch-disabled-tests.json exist. (Though you won't see them in your file manager as they are hidden files.)
Pull Request resolved: https://github.com/pytorch/pytorch/pull/69258
Reviewed By: seemethere
Differential Revision: D32807102
Pulled By: janeyx99
fbshipit-source-id: ed1b227cdd32160ed045dd79a7edc55216dcfe53
