Allow `Iceberg` database in version 25.3+

[ianton-ru]

In ClickHouse version 25.3 database Iceberg was removed, instead added database DataLakeCatalog with parameter catalog_type.

To backward compatibility add Iceberg as alias DataLakeCatalog with catalog_type='rest'.

[alex-zaitsev]

Released in Antalya 25.3.3