Enhance delete-expired-group-metadata logging

Hi team,

When you try to understand why a consumer group offset was expired, the default INFO logging on the group coordinator does not give much : 

info(s"Removed $numOffsetsRemoved expired offsets in ${time.milliseconds() - currentTimestamp} milliseconds.")

https://github.com/apache/kafka/blob/22d056c9b76c9bf8417d8701594d1fcee1c6a655/core/src/main/scala/kafka/coordinator/group/GroupMetadataManager.scala#L834

Considering the rest of the available logs are at TRACE level if I'm not mistaking, and my use is mostly root cause analysis type of work, the INFO log is mostly what Kafka Admin get "post offset deletion"

Would it be possible to enhance this log with the actual group/topic/partition that was removed please ? 

Thank you