SYSTEM KILL command implemented in Docker

Why it matters

The feature enables the SYSTEM KILL command to function properly when ClickHouse is running inside Docker environments. This solves the issue where process termination commands were ineffective within Docker, allowing users to manage and kill queries or processes reliably in containerized setups.

How to use it

Users running ClickHouse within Docker can now use the SYSTEM KILL command exactly as they would on native installations to terminate queries or other operations. No additional configuration is required other than deploying ClickHouse in Docker.