Add health check to streams app helm chart

[philipp94831]

https://blog.softwaremill.com/whats-the-proper-kubernetes-health-check-for-a-kafka-streams-application-c9c00a112581

Idea: Create health check class as described in https://github.com/kijanowski/kafka-streams-health-check and have an optional livenessProbe

livenessProbe:
  enabled: true
  initalDelaySeconds: 5
  ...