MDEV-24465: Added wait condition to make sure table t1 is replicated to node_2.

mysql-test/suite/galera/t/galera_rsu_error.test

@@ -9,6 +9,9 @@ CREATE TABLE t1 (f1 INTEGER) Engine=InnoDB;
 INSERT INTO t1 VALUES (1), (1);
 
 --connection node_2
+--let $wait_condition = SELECT COUNT(*) = 1 FROM INFORMATION_SCHEMA.INNODB_SYS_TABLES WHERE NAME LIKE 'test/t1';
+--source include/wait_condition.inc
+
 SET SESSION wsrep_OSU_method = "RSU";
 --error ER_DUP_ENTRY
 ALTER TABLE t1 ADD PRIMARY KEY (f1);