Cannot run multiple test files with PHPUnit

### Apache NetBeans version

Apache NetBeans 17

### What happened

Only the first item is run when we select multiple test/tested files.

### How to reproduce

### Steps :
1. Create a New Project: "File > New Project..."
2. Select "Samples > PHP > Calculator - PHPUnit Sample Application"
3. Edit composer.json: `"phpunit/phpunit": "~8"` to `"phpunit/phpunit": "~9"`
4. Read readme.html (Requirements) then install PHPUnit
5. Add tested and test files.: e.g. `Calculator2`, `Calculator2Test` (copy `Calculator*` and rename to `Calclulator2*`)
6. Select `CalculatorTest` and `Calculator2Test` (or `Calculator` and `Calculator2`)
7. Run > Run File (or Run > Run Tests)
8. The first selected file is run

### Did this work correctly in an earlier version?

No / Don't know

### Operating System

Ubuntu 22.04

### JDK

OpenJDK 11.0.18

### Apache NetBeans packaging

Apache NetBeans provided installer

### Anything else

_No response_

### Are you willing to submit a pull request?

No

Reproduce the issue with the CalculatorTest and Calculator2Test files from the PHP Calculator - PHPUnit Sample Application, using composer.json with PHPUnit ~9. Start from the Run File and Run Tests actions; done means selecting multiple test or tested files runs every selected file rather than only the first.

Written by the indexing model from the issue text.