Documentation: How to connect via DBeaver

[sbernauer]

Extracted out of https://github.com/stackabletech/stackablectl/pull/144

• [x] Demo data-warehouse-iceberg-trino-spark links to this section on how to connect with DBeaver

[fhennig]

Here is the live changes, the demo links to the instructions: https://docs.stackable.tech/stackablectl/stable/demos/data-lakehouse-iceberg-trino-spark.html#_connect_to_trino