Add setting to disable limit on kafka_num_consumers

Why it matters

This feature addresses the limitation on the number of Kafka consumers that can be configured via the kafka_num_consumers setting. By allowing users to disable this limit, it provides greater flexibility in consuming from Kafka topics, which is useful for workloads requiring a higher number of parallel consumers.

How to use it

To use this feature, enable the new setting that disables the limit on kafka_num_consumers. This is typically done by setting the respective configuration option to disable the consumer count restriction in your Kafka table configuration or server settings.