arrow

GH-43299: [Release][Packaging] Only include pyarrow folder  when finding packages on setuptools (#43325)

### Rationale for this change

Currently we include everything when building wheels, see:
```
$ pip install pyarrow
Collecting pyarrow
  Downloading pyarrow-17.0.0-cp310-cp310-manylinux_2_28_x86_64.whl (39.9 MB)
     ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 39.9/39.9 MB 33.8 MB/s eta 0:00:00
Collecting numpy>=1.16.6
  Using cached numpy-2.0.0-cp310-cp310-manylinux_2_17_x86_64.manylinux2014_x86_64.whl (19.3 MB)
Installing collected packages: numpy, pyarrow
Successfully installed numpy-2.0.0 pyarrow-17.0.0
(test-env)  $ ls test-env/lib/python3.10/site-packages/
benchmarks/                  distutils-precedence.pth     numpy-2.0.0.dist-info/       pip-22.0.2.dist-info/        pyarrow-17.0.0.dist-info/    setuptools-59.6.0.dist-info/ 
cmake_modules/               examples/                    numpy.libs/                  pkg_resources/               scripts/                     
_distutils_hack/             numpy/                       pip/                         pyarrow/                     setuptools/    
```

### What changes are included in this PR?

Use `include` as seen here: https://setuptools.pypa.io/en/latest/userguide/package_discovery.html#finding-simple-packages

### Are these changes tested?

Will check via the build wheel on CI

### Are there any user-facing changes?

No and yes :)
We will remove unnecessary files
* GitHub Issue: #43299

Lead-authored-by: Raúl Cumplido <raulcumplido@gmail.com>
Co-authored-by: Antoine Pitrou <antoine@python.org>
Signed-off-by: Joris Van den Bossche <jorisvandenbossche@gmail.com>