[CI][Java] *-sources.jar include *.{so,dylib,dll}

### Describe the bug, including details regarding any error messages, version, and platform.

https://github.com/ursacomputing/crossbow/releases/tag/nightly-packaging-2024-02-08-0-github-java-jars

For example, `arrow-dataset-16.0.0-SNAPSHOT-sources.jar` includes the following:

```console
$ find arrow-dataset-16.0.0-SNAPSHOT-sources | grep -E '\.(so|dylib|dll)'
arrow-dataset-16.0.0-SNAPSHOT-sources/arrow_dataset_jni/aarch_64/libarrow_dataset_jni.dylib
arrow-dataset-16.0.0-SNAPSHOT-sources/arrow_dataset_jni/aarch_64/libarrow_dataset_jni.so
arrow-dataset-16.0.0-SNAPSHOT-sources/arrow_dataset_jni/x86_64/libarrow_dataset_jni.dylib
arrow-dataset-16.0.0-SNAPSHOT-sources/arrow_dataset_jni/x86_64/arrow_dataset_jni.dll
arrow-dataset-16.0.0-SNAPSHOT-sources/arrow_dataset_jni/x86_64/libarrow_dataset_jni.so
```

Those binaries are too large. So we should avoid this.

### Component(s)

Continuous Integration, Java

Start by inspecting the nightly Java release artifact linked in the issue and reproduce the `find` check against its `*-sources.jar` contents. Trace the CI or packaging step that assembles these source archives; done means the source jars no longer contain `.so`, `.dylib`, or `.dll` files.

Written by the indexing model from the issue text.