Support using custom disks to store databases

Why it matters

This feature allows users to specify custom storage disks for database metadata files, providing flexibility in how and where metadata is stored. It helps optimize storage management and resource allocation by separating metadata storage from other data, enhancing performance and maintainability.

How to use it

Currently, the configuration is applied at the global server level. Users can define custom disks in the server configuration files and set the storage location for database metadata files accordingly.