Issues with using Junit Sampler

### Expected behavior

When adding Junit Sampler, you can choose Classname and Test Method

### Actual behavior

When adding Junit Sampler, Classname and Test Method cannot be selected

### Steps to reproduce the problem

1. Add thread group
2. Add JUnit Request
3. Select Classname and Test Method
4.

### JMeter Version

5.6.3

### Java Version

java 11.0.15.1 2022-04-22 LTS

### OS Version

macos sonoma 14.4