Replaced ClickHouse-Keeper Default Ports from 44444 to 9234

Why it matters

The default port 44444 used for clickhouse-keeper's internal communication was changed to 9234 to resolve port conflicts and improve network management, as reported in issue #30879. This update prevents connection issues caused by port clashes.

How to use it

Users should update their configurations to use the new default port 9234 for clickhouse-keeper internal communication if they rely on the default settings. No additional action is needed if custom ports are already configured.