Try to fix flaky test_distributed_load_balancing tests (#49912)

* Try to fix flaky test_distributed_load_balancing tests

* Automatic style fix

---------

Co-authored-by: robot-clickhouse <robot-clickhouse@users.noreply.github.com>
Co-authored-by: Alexander Tokmakov <tavplubix@clickhouse.com>

tests/integration/test_distributed_load_balancing/test.py

@@ -9,9 +9,21 @@
 
 cluster = ClickHouseCluster(__file__)
 
-n1 = cluster.add_instance("n1", main_configs=["configs/remote_servers.xml"])
-n2 = cluster.add_instance("n2", main_configs=["configs/remote_servers.xml"])
-n3 = cluster.add_instance("n3", main_configs=["configs/remote_servers.xml"])
+n1 = cluster.add_instance(
+    "n1",
+    main_configs=["configs/remote_servers.xml"],
+    user_configs=["configs/users.xml"],
+)
+n2 = cluster.add_instance(
+    "n2",
+    main_configs=["configs/remote_servers.xml"],
+    user_configs=["configs/users.xml"],
+)
+n3 = cluster.add_instance(
+    "n3",
+    main_configs=["configs/remote_servers.xml"],
+    user_configs=["configs/users.xml"],
+)
 
 nodes = len(cluster.instances)
 queries = nodes * 10