Fix test 02845_threads_count_in_distributed_queries

tests/queries/0_stateless/02845_threads_count_in_distributed_queries.sql.j2

@@ -1,3 +1,7 @@
+-- Tags: no-parallel, no-fasttest
+-- ^ because query_thread_log is not guaranteed to be written under high load
+-- (when the queue is full, events are silently dropped)
+
 -- enforce some defaults to be sure that the env settings will not affect the test
 SET max_threads=5, async_socket_for_remote=1, prefer_localhost_replica=1, optimize_read_in_order=1, load_marks_asynchronously=0, local_filesystem_read_method='pread', remote_filesystem_read_method='read';