Use ConsumerGroupMetadata for offset commits for stronger semantics

[bplommer]

As stated in https://kafka.apache.org/documentation/#upgrade_3_0_0:

The Producer#sendOffsetsToTransaction(Map offsets, String consumerGroupId) method has been deprecated. Please use Producer#sendOffsetsToTransaction(Map offsets, ConsumerGroupMetadata metadata) instead, where the ConsumerGroupMetadata can be retrieved via KafkaConsumer#groupMetadata() for stronger semantics. Note that the full set of consumer group metadata is only understood by brokers or version 2.5 or higher, so you must upgrade your kafka cluster to get the stronger semantics. Otherwise, you can just pass in new ConsumerGroupMetadata(consumerGroupId) to work with older brokers. See KIP-732 for more details.