[Bug]: Do not run pipeline probe if you are running a source pipeline with a test pipeline.

### Apache Hop version?

2.18

### Java version?

21

### Operating system

Linux

### What happened?

For some reason, if I have a source pipeline running with a test pipeline where the test pipeline contains variables, it doesn't generate data for the probe pipeline.

### Issue Priority

Priority: 3

### Issue Component

Component: Transforms