Solution for confusion in Spine Generic

[sandrinebedard]

Description

It might be confusing to have space-other in some of the labels but not all of them, also considering that we applided reorientation and resampling, but some of them were already in the right space.

Proposed solution

• Move the data from the root directory in sourcedata folder
• Move derivatives/data-preprocessed to the root directory
• Update the naming to remove space-other
• Make sure all the labels correspond to the new root space

TODO

• Edit change log
• Make a release
• Announce in neurostars and sct forum
• Update spinegeneric scripts
• Keep DWI data and root in source data folder