Type of change

• Task

Description

This PR continues in the ZooKeeper removal and removes ZooKeeper from the packaging files:

• From examples
  • KRaft example files were moved to the examples/kafka directory
  • The KRaft kafka.yaml example was renamed to kafka-persistent.yaml to ensure any old links keep working
  • The ZooKeeper alerts were removed
  • The ZooKeeper Grafana dashboard and the ZooKeeper request latency from the Kafka dashboard were removed
  • All other examples using Kafka clusters (such as MM2, CC, Security, Metrics, ...) were updated to use KRaft
• Any ZooKeeper mentions in the YAML installation files and Helm Chart were removed. This includes mainly some comments, CO logging configuration and the ZooKeeper Grafana dashboard in Helm chart
• Only minimal documentation updates were done -> the parts of the docs related to the examples were updated to be in-sync with the updates examples. But no other changes were made.
• Example files references in the system tests were updated (or removed when unused)

Checklist

• Make sure all tests pass
• Update documentation
• Check RBAC rights for Kubernetes / OpenShift roles
• Try your changes from Pod inside your Kubernetes and OpenShift cluster, not just locally