 [Doctest] Add `configuration_data2vec_vision.py`
Add `configuration_data2vec_vision.py` to `utils/documentation_tests.txt` for doctest.

Based on issue #19487

@ydshieh could you take a look at it?
Thank you =)
_The documentation is not available anymore as the PR was closed or merged._<|||||>@ydshieh made the required changes :)