fix: data-lakehouse-iceberg-trino-spark demo

[labrenbe]

• Add configOverrides for the SNI check to NiFi
• Create a ConfigMap for the NiFi flow file keeping LakehouseKafkaIngest.json for backward compatibility
• Use the new Headless Service for the Kafka3ConnectionService in NiFi

[Techassi]

This is basically the same change as in #319. Can we only use one CM for this?

[labrenbe]

This is basically the same change as in #319. Can we only use one CM for this?

If you're referring to the ConfigMap containing the NiFi flow then unfortunately not because the NiFi flow in this demo uses additional data sets.

[Techassi]

This is basically the same change as in #319. Can we only use one CM for this?

If you're referring to the ConfigMap containing the NiFi flow then unfortunately not because the NiFi flow in this demo uses additional data sets.

Well... That's unfortunate.

ConfigMap has slightly different content. We therefor cannot use the same CM.