[polardbx][test] Bump the polardb-x image version from 2.0.1 to 2.10 (apache#1423)

Author: leonardBang

flink-connector-mysql-cdc/src/test/java/com/ververica/cdc/connectors/polardbx/PolardbxSourceITCase.java

@@ -77,7 +77,7 @@ public class PolardbxSourceITCase extends AbstractTestBase {
     private static final String USER_NAME = "polardbx_root";
     private static final String PASSWORD = "123456";
     private static final String DATABASE = "polardbx_ddl_test";
-    private static final String IMAGE_VERSION = "2.0.1";
+    private static final String IMAGE_VERSION = "2.1.0";
     private static final DockerImageName POLARDBX_IMAGE =
             DockerImageName.parse("polardbx/polardb-x:" + IMAGE_VERSION);