Fixture in `test_examples.py` to clean up generated data files #301

Job	Run time
py3.12 \| macos \| integration tests	12m 53s
mypy	3m 48s
py3.12 \| ubuntu \| integration tests	17m 44s
py3.12 \| macos \| unit tests	9m 46s
py3.12 \| windows \| integration tests	33m 48s
py3.12 \| ubuntu \| unit tests	13m 44s
py3.12 \| windows \| unit tests	21m 42s
py3.10 \| ubuntu \| unit tests	12m 50s
py3.11 \| ubuntu \| unit tests	12m 48s
merge-test-artifacts	2s
	2h 19m 5s

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