Clean parameterized hfun interface #478

Job	Run time
test_ibcdfo (macos-15-intel, latest)	6m 54s
test_ibcdfo (macos-15, R2021a)	9m 59s
test_ibcdfo (macos-14, R2021a)	8m 44s
test_ibcdfo (ubuntu-22.04, latest)	3m 17s
test_ibcdfo (ubuntu-22.04, R2021a)	3m 38s
test_ibcdfo (ubuntu-24.04, latest)	3m 45s
test_ibcdfo (macos-15-intel, R2021a)	6m 17s
test_ibcdfo (macos-15, latest)	4m 18s
test_ibcdfo (macos-14, latest)	4m 43s
test_ibcdfo (ubuntu-24.04, R2021a)	3m 47s
	55m 22s

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