ci/lava: Artifacts returned from DUTs
Now the "Browse" button on the job takes you to useful output just like bare-metal has.
Some examples from jobs where I forced failures to occur:
- https://anholt.pages.freedesktop.org/-/mesa/-/jobs/8959679/artifacts/results/dEQP-GLES3.functional.fbo.blit.rect.nearest_consistency_mag.xml
- https://anholt.pages.freedesktop.org/-/mesa/-/jobs/8959681/artifacts/results/summary/problems.html
As you can see from the traces page when you drill into the failing test, we still have issues with getting reference images sometimes. But the traces dashboard fails at that all the time, too.