Disable parallel run for 00985_merge_stack_overflow

Since parallel queries to system.columns may fail with
TOO_DEEP_RECURSION too.

CI: https://s3.amazonaws.com/clickhouse-test-reports/33201/0013a2fdee26fc11a34ebffaf10f69d7cfff9b3a/fast_test__actions_.html

Signed-off-by: Azat Khuzhin <a.khuzhin@semrush.com>

Author: azat

tests/queries/0_stateless/00985_merge_stack_overflow.sql

@@ -1,11 +1,14 @@
+-- Tags: no-parallel
+--       ^^^^^^^^^^^ otherwise you may hit TOO_DEEP_RECURSION error during querying system.columns
+
 DROP TABLE IF EXISTS merge1;
 DROP TABLE IF EXISTS merge2;
 
 CREATE TABLE IF NOT EXISTS merge1 (x UInt64) ENGINE = Merge(currentDatabase(), '^merge\\d$');
 CREATE TABLE IF NOT EXISTS merge2 (x UInt64) ENGINE = Merge(currentDatabase(), '^merge\\d$');
 
-SELECT * FROM merge1; -- { serverError 306 }
-SELECT * FROM merge2; -- { serverError 306 }
+SELECT * FROM merge1; -- { serverError TOO_DEEP_RECURSION }
+SELECT * FROM merge2; -- { serverError TOO_DEEP_RECURSION }
 
 DROP TABLE merge1;
 DROP TABLE merge2;