INST: install_sct: managed installation from git or package
INST: install_sct: managed installation from git or package

Former-commit-id: 13bcbcebc92ef25cffe89c7cc595ca0b2843a6b6
Former-commit-id: ab2310491af43e1fcf5d45b137e851476d1bb2bf
3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox