Evaluate buildbot-test suite

Make sure we do not introduce new bugs by switching from services to containers.
On hz-bbm1 python libraries/modules are locked into the versions they were last updated to but the containers are updated more often.

How to test:

docker run -it --rm quay.io/mariadb-foundation/bb-master:master bash

apt update && apt install build-essential, python3-dev

source .venv/bin/activate

pip install -e master[test]

trial buildbot