Current situation
Before each test suite execution, the built artifacts are re-loaded into the local docker image store. This is convenient, because this way we ensure that we always test what is in the artifacts folder. But it also slows down the tests a lot.

Goal
Decouple artifacts loading and test execution, so we can run tests without reloading the images all the time. Make sure it is clear to the develper which image is tested now though. Also the CI should of course keep testing its own builds.