[Bug]: The Hop fat jar builder needs to include META-INF/MANIFEST.MF

### Apache Hop version?

2.18.0-SNAPSHOT

### Java version?

OpenJDK 21

### Operating system

Linux

### What happened?

The file needs to contain:

```
Manifest-Version: 1.0
Multi-Release: true
```

The Mutli-Release part is important to allow the JVM to pick up versions below 21.

### Issue Priority

Priority: 2

### Issue Component

Component: Beam