[Improvement] remove warehouse properties in Iceberg catalog WEB UI if the catalog backend is REST

### What would you like to be improved?

remove warehouse properties in Iceberg catalog WEB UI if the catalog backend is REST because warehouse is optional for REST catalog backend, and in most cases user doesn't need to set warehouse for REST backend.

### How should we improve?

Start by locating the Iceberg catalog web UI form and the code that identifies a REST catalog backend. Confirm how warehouse properties are currently displayed. Done means warehouse properties are hidden for REST catalogs while remaining available for other catalog backends; verify the resulting UI behavior.

Written by the indexing model from the issue text.