chore(ci): drop unit testing

[nijel]

Proposed changes

• the wheel no longer includes test dependencies
• we might eventually discard even the test data
• faster publishing of docker image

Checklist

• Lint and unit tests pass locally with my changes.
• I have added tests that prove my fix is effective or that my feature works.
• I have added documentation to describe my feature.
• I have squashed my commits into logic units.
• I have described the changes in the commit messages.

Other information