WIP: Hazelcast Jet Benchmark/Docker-Compose/Kubernetes implementation

Hazelcast Jet implementation for benchmark use cases (eventually 1-3 or 1-4) with an additional commons project; docker-compose implementation for hazelcast jet; kubernetes implementation for hazelcast jet;

Open points:

• Add benchmark implementations. This includes
  • UC1
  • UC2
  • UC3
  • UC4
• Move common logic to a "hazelcastjet-commons" project, similar to those of the other implementations
• Add docker-compose files for all Hazelcast Jet implementations (might be tackled by a follow-up merge request)
• Add Kubernetes benchmark definitions for all Hazelcast Jet implementations (might be tackled by a follow-up merge request). This includes:
  • Kubernetes Deployments + Services + maybe other resources
  • A Kubernetes benchmark resource of kind benchmarks.theodolite.com
• Ensure that record lag can be monitored via Prometheus and Kafka Lag Exporter (@she can assist here)
• Provide appropriate documentation

TODO for @she:

• Remove commits from flink-benchmark-def-with-rm-rebalance Branch