[TEST] Remove `skip_question` parameters from tests

[AliceJoubert]

For some non-regression tests there is still a parameter skip_question while it is not used later on :

clinica/test/nonregression/pipelines/anat/test_t1_volume.py

Lines 27 to 33 in 4bd9f4d

	pipeline = T1VolumeTissueSegmentation(
	bids_directory=fspath(input_dir / "bids"),
	caps_directory=fspath(output_dir / "caps"),
	tsv_file=fspath(input_dir / "subjects.tsv"),
	parameters={"skip_question": False},
	base_dir=fspath(working_dir),
	)

These should be removed.

[JiwaniZakir]

The skip_question parameter appears to be a leftover from an earlier version of the test infrastructure where tests may have prompted for user confirmation before running — a pattern that was likely removed when the test suite was automated or refactored. Since the parameter is accepted but never consumed in the function body, it silently does nothing, which can mislead developers into thinking it controls some behavior. The affected functions in test/nonregression/pipelines/anat/test_t1_volume.py (lines 27–33) are the known example, but it's worth doing a grep across the full test/nonregression/ directory for other occurrences of skip_question in function signatures to ensure a complete cleanup.