ThreadGroup line 273 cloneTree(threadGroupTree)，I have setted CSVDataSet with filename，but after cloneTree，my filename was lost

### Expected behavior

I hope cloneTree will not lost data in threadGroupTree

### Actual behavior

after cloneTree, my data has lost

### Steps to reproduce the problem

// 创建一个CSV Data Set Config元件
CSVDataSet csvDataSet = new CSVDataSet();
csvDataSet.setFilename("D:\\work\\user.csv"); // CSV文件路径
csvDataSet.setVariableNames("username,password"); // CSV文件中的列名
csvDataSet.setDelimiter(","); // CSV文件的分隔符

// 创建一个 LoopController
LoopController loopController = new LoopController();
loopController.setLoops(1); // 设置循环次数
loopController.initialize();

ThreadGroup threadGroup = new ThreadGroup();
threadGroup.setNumThreads(1);
threadGroup.setRampUp(0);
threadGroup.setSamplerController(loopController);

// 创建一个TestPlan
TestPlan testPlan = new TestPlan("My Test Plan");

// 创建一个HashTree来保存TestPlan
ListedHashTree loginPlanTree = new ListedHashTree();
ListedHashTree threadGroupHashTree = (ListedHashTree) loginPlanTree.add(testPlan, threadGroup);
threadGroupHashTree.add(cookieManager);
threadGroupHashTree.add(csvDataSet);

### JMeter Version

5.6.3

### Java Version

java 17.0.10 2024-01-16 LTS Java(TM) SE Runtime Environment Oracle GraalVM 17.0.10+11.1 (build 17.0.10+11-LTS-jvmci-23.0-b27) Java HotSpot(TM) 64-Bit Server VM Oracle GraalVM 17.0.10+11.1 (build 17.0.10+11-LTS-jvmci-23.0-b27, mixed mode, sharing)

### OS Version

Microsoft Windows 11 家庭中文版