[REVIEW REQUEST] LogCleaner, ZkConfig moved to java

[Николай Ижиков]

Hello.

I prepared two PRs that moves parts of KafkaConfig to java.

[1] https://github.com/apache/kafka/pull/15387 - Log cleaner configuration 
moved to CleanerConfig
[2] https://github.com/apache/kafka/pull/15075 - ZooKeeper configuration moved 
to ZkConfig

Please, take a look.