[Improvement] Add the Trino document for Iceberg REST Catalog

### What would you like to be improved?

Add the Trino document for Iceberg REST Catalog.
Now, our Trino image doesn't support credential vending. Trino community doesn't support basic authentication yet.

### How should we improve?

Add the Trino document for Iceberg REST Catalog

No file or test is named in the issue. Start by locating the existing Trino and Iceberg REST Catalog documentation, then review how credential vending and authentication limitations are described. Done means adding a Trino-specific REST Catalog document that reflects the stated support constraints.

Written by the indexing model from the issue text.