OPT: removed get_orientation and set_orientation from sct_utils
OPT: removed get_orientation and set_orientation from sct_utils

Former-commit-id: 6fdf202a93a5536616a52647322135905d897bcc [formerly 8280c4a23320fbe809f707594d306b63b68dcfe0]
Former-commit-id: b466b6c3738441ff32a8defc3c03335142621ff2
Former-commit-id: 8b8fca07e464541e6210c7c819e5b30f49cc00e3
neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox