Antalya 25.6.5 Backport of #83298 Do not throw exception on connection with incorrect iceberg database#970

Enmk merged 2 commits intoantalya-25.6.5Altinity/ClickHouse:antalya-25.6.5from

backports/project-antalya/83298-do-not-throw-icebergAltinity/ClickHouse:backports/project-antalya/83298-do-not-throw-icebergCopy head branch name to clipboard