[To dev/1.3] Pipe: Fixed the legacy sink IT (#17164) (#17165)

Author: Caideyipi

integration-test/src/test/java/org/apache/iotdb/pipe/it/autocreate/IoTDBPipeDataSinkIT.java

@@ -203,7 +203,7 @@ public void testLegacyConnector() throws Exception {
     final String receiverIp = receiverDataNode.getIp();
     final int receiverPort = receiverDataNode.getPort();
 
-    try (final Connection connection = EnvFactory.getEnv().getConnection();
+    try (final Connection connection = senderEnv.getConnection();
         final Statement statement = connection.createStatement()) {
       statement.execute(
           String.format(