refactor: clean up Kafka listeners #2392

Job	Run time
Check if committed README is the one we would render from the available parts	31s
Run RustDoc	1m 22s
Run Cargo Tests	47s
Run Cargo Deny (advisories)	46s
Run Cargo Deny (bans licenses sources)	43s
Run Cargo Udeps	2m 4s
Check if committed Helm charts are up to date	45s
Run Rustfmt	13s
Decide if Helm charts are pushed to the helm repository based on action trigger	3s
Run Clippy	40s
All tests passed	5s
Package Charts, Build Docker Image and publish them - ubicloud-standard-8-arm	9m 2s
Package Charts, Build Docker Image and publish them - ubuntu-latest	11m 22s
Build and publish manifest list	41s
Run the OpenShift Preflight check on the published images	19s
	29m 23s

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