CI bug: Flaky test keeps failing unpredictably

I've seen quite often that builds fail in this specific way (in the MacOS environment): ``` =========================== short test summary info ============================ FAILED tests/test_cmap.py::test_text_extraction_fast[None-ASurveyofImageClassificationBasedTechniques.pdf-False] - FileNotFoundError: [Errno 2] No such file or directory: '/Users/runner/work/pypdf/pypdf/tests/pdf_cache/ASurveyofImageClassificationBasedTechniques.pdf' ``` [Example](https://github.com/py-pdf/pypdf/actions/runs/26564860172/job/78256808547?pr=3400). I don't really know how to fix this, but it would improve developer ergonomics quite substantially if this were fixed.