Allow to ATTACH Live Views (for Example, at the Server Startup) Regardless to Allow_experimental_live_view Setting

Why it matters

This feature allows users to attach existing live views, for example during server startup, without being restricted by the experimental live view setting. It facilitates smoother management and recovery of live views in ClickHouse.

How to use it

To use this feature, simply run the ATTACH LIVE VIEW view_name command. This will attach the live view even if allow_experimental_live_view is disabled in the server configuration.