Implement SYSTEM DROP REPLICA from Auxiliary ZooKeeper Clusters

Why it matters

This feature allows users to manage replicas in auxiliary ZooKeeper clusters by enabling the drop replica operation. It solves the problem of replica cleanup and management when using auxiliary ZooKeeper clusters, improving cluster maintenance and consistency.

How to use it

Use the SYSTEM DROP REPLICA command specifying the target replica to remove it from an auxiliary ZooKeeper cluster. This extends the existing system command functionality to auxiliary clusters for easier replica administration.