librdkafka needs updating to fully support new kafka4 consumer group rebalance protocol

### Company or project name

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### Use case

librdkafka update to 2.12 to fully support latest kafka 4 consumer group rebalance protocol.

### Describe the solution you'd like

any

### Describe alternatives you've considered

_No response_

### Additional context

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No files or tests are named. Start by locating ClickHouse's librdkafka dependency and Kafka consumer integration, then check the current dependency version against librdkafka 2.12 and Kafka 4 consumer group rebalance support. Done means the dependency is updated and the relevant Kafka consumer behavior is verified.

Written by the indexing model from the issue text.