fix: lock percona toolkit version

Signed-off-by: yuxiqian <34335406+yuxiqian@users.noreply.github.com>

Author: yuxiqian

flink-cdc-connect/flink-cdc-source-connectors/flink-connector-mysql-cdc/src/test/java/org/apache/flink/cdc/connectors/mysql/source/MySqlOnLineSchemaMigrationSourceITCase.java

@@ -80,7 +80,7 @@ public class MySqlOnLineSchemaMigrationSourceITCase extends MySqlSourceTestBase
     private static final String TEST_USER = "mysqluser";
     private static final String TEST_PASSWORD = "mysqlpw";
 
-    private static final String PERCONA_TOOLKIT = "perconalab/percona-toolkit";
+    private static final String PERCONA_TOOLKIT = "perconalab/percona-toolkit:3.5.7";
 
     protected static final GenericContainer<?> PERCONA_TOOLKIT_CONTAINER =
             createPerconaToolkitContainer();

flink-cdc-connect/flink-cdc-source-connectors/flink-connector-mysql-cdc/src/test/java/org/apache/flink/cdc/connectors/mysql/table/MySqlOnLineSchemaMigrationTableITCase.java

@@ -78,7 +78,7 @@ public class MySqlOnLineSchemaMigrationTableITCase extends MySqlSourceTestBase {
     private static final String TEST_USER = "mysqluser";
     private static final String TEST_PASSWORD = "mysqlpw";
 
-    private static final String PERCONA_TOOLKIT = "perconalab/percona-toolkit";
+    private static final String PERCONA_TOOLKIT = "perconalab/percona-toolkit:3.5.7";
 
     protected static final GenericContainer<?> PERCONA_TOOLKIT_CONTAINER =
             createPerconaToolkitContainer();