WIP: Use interface library variable #998

Job	Run time
build-test-notebooks (ubuntu-24.04)	2m 16s
build-test-cxx (ubuntu-24.04)	20m 45s
build-test-notebooks (windows-2022)	3m 47s
build-test-documentation (ubuntu-24.04)	45m 17s
build-test-cxx (windows-2022)	26m 28s
build-test-python-superbuild (macos-15)	19m 39s
build-test-python-superbuild (ubuntu-24.04)	26m 36s
build-test-python-superbuild (windows-2022)	25m 51s
build-test-notebooks (macos-14)	2m 29s
build-test-cxx (macos-14)	13m 40s
	3h 6m 48s

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