Artifacts tab should be shown to unprivileged users
Viewing a build page like https://circleci.com/gh/scikit-learn/scikit-learn/19462 without being signed in does not show the Artifacts tab. But appending #artifacts (https://circleci.com/gh/scikit-learn/scikit-learn/19462#artifacts) still works.
We have to advise contributors to manually add #artifacts, which seems absurd.
The tab should be shown whenever artifacts are available, regardless of the user.