[bitnami/kafka] Add SCRAM support for KRaft #42416
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Description of the change
The Kafka container is currently hardcoded to use Zookeeper for SCRAM credential storage. This PR adds support for using KRaft.
It uses kafka-storage.sh to create the configured users during initialisation. This functionality is described here: https://cwiki.apache.org/confluence/display/KAFKA/KIP-900%3A+KRaft+kafka-storage.sh+API+additions+to+support+SCRAM+for+Kafka+Brokers
Benefits
Support for SCRAM using KRaft
Possible drawbacks
Unknown
Applicable issues
#41415
Additional information
This is my first ever PR, please let me know if I've done something wrong 😄