Merge pull request #11170 from ClickHouse/fix-flacky-test-group-by-no-merge

Fix flacky test "01247_distributed_group_by_no_merge_GROUP_BY_injective_sharding_key"

tests/queries/0_stateless/01247_distributed_group_by_no_merge_GROUP_BY_injective_sharding_key.sql

 -- TODO: correct testing with real unique shards
 
+-- Avoid "Connection failed at try №1" messages.
+SET send_logs_level = 'none';
+SET connect_timeout_with_failover_ms = 5000;
+
 set optimize_distributed_group_by_sharding_key=1;
 
 drop table if exists dist_01247;