scripts/sct_warp_template.py: use get_indiv_label_info
scripts/sct_warp_template.py: use get_indiv_label_info


Former-commit-id: d69daade455072fff87a9bb266bc99bfd7681829
neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox