Reverts functionality to include the runAttempt in the artifact upload
prefix. This has proven to make it impossible to actually re-run tests
as test re-runs will try to pull from a prefix which doesn't actually
include artifacts

Signed-off-by: Eli Uriegas <eliuriegasfb.com>

Pull Request resolved: https://github.com/pytorch/pytorch/pull/78184



Signed-off-by: Eli Uriegas <eliuriegas@fb.com>

Approved by: https://github.com/malfet