Added support for dynamic reload of ZooKeeper configuration in ClickHouse without requiring server restart.
Why it matters
This feature allows users to update ZooKeeper connection settings on the fly, solving the problem of downtime or manual restarts when ZooKeeper configuration changes are needed. It improves operational flexibility and reduces service interruptions.How to use it
Modify the ZooKeeper configuration file as needed and use the new mechanism to reload the configuration dynamically. This avoids restarting the ClickHouse server to apply changes in ZooKeeper connection parameters.