Summary

Issues with the recently merged experiment tests.

• They looked for the json files in a non-existent path. Updated the path.
• They relied on the full stack for testing. We won't have a minio component or database component in these runners, so I've removed them from running as part of the unit tests. They aren't unit tests if they require other components.
• Copilot wanted a change to the harness because it suspects there's expected data for these tests to run. @alex-struk, I suggest you test this with your setup as well to see if it breaks things for you. I still seem to have issues running the experiment tests, but I'm not sure it it's related to these changes, the previous merge, or if I'm missing some component.

Checklist

By submitting this pull request, I acknowledge that I have attempted to meet the following:

• a self-review of my code
• commented code particularly in hard-to-understand areas
• corresponding changes to the documentation where required
• changes tested to the best of my ability
• no new errors or non-functional code