Allow cluster request with undefined cluster on secondary nodes#1479

ianton-ru wants to merge 3 commits intoantalya-25.8Altinity/ClickHouse:antalya-25.8from

feature/antalya-25.8/do_not_use_cluster_on_swarmAltinity/ClickHouse:feature/antalya-25.8/do_not_use_cluster_on_swarmCopy head branch name to clipboard