KafkaTuningConfiguration spec is incorrectly documented & Implemented

[acherla]

Affected Version

28.x and 29.x versions

Description

There seems to be a minor bug in the KafkaSupervisorTuningConfig implementation which is no longer showing the chatAsync or the numPersistThreads configuration when saving kafka supervisor jobs in the druid console https://github.com/apache/druid/blob/druid-29.0.1-rc1/extensions-core/kafka-indexi[…]ruid/indexing/kafka/supervisor/KafkaSupervisorTuningConfig.java

per the docs https://druid.apache.org/docs/latest/ingestion/kafka-ingestion/#tuning-configuration these tuning configuration parameters should be available.

I figured numPersistThreads would likely come in the 30.x release for druid, as the MR for it was merged a week after the 29.0 release, and didnt make the cut off period for it back in jan.

for chatAsync seems like it was removed back in 28.x but the documentation is just reflecting an incorrect configuration option. #14692