* Revert "Revert "Make artifact downloading more robust for flaky networks" (#13995)"
This reverts commit 33d8a03545.
* Use subdirectories to organize cached files
* Fix unauthorized import
* Revert "Revert "Make artifact downloading more robust for flaky networks" (#13995)"
This reverts commit 33d8a03545.
* Use subdirectories to organize cached files
* Fix unauthorized import