Refactor e2e test setup to reuse the existing testing framework

The current setup of the e2e tests relies on a bash script calling docker compose, while the overall tests are set up using python and some existing utility functions. These two approaches should be unified and the current call to run the e2e tests should be replaced with a filtering call to pytest...

Acceptance criteria: 

• e2e tests are called along general integration tests
• e2e tests reuse existing testing framework
• testing container is built on e2e test and Dockerfile change (and retrieved from image repo during test runs)