The change is motivated by using the actual CIE standard, preparing for the
Spectral Cycles, and making followup AgX integration more straight forward.
On a user level this change renames XYZ space to Linear CIE-XYZ D65, and
introduces Linear CIE-XYZ E.
The aliases are configured so that the backward compatibility is preserved.
The forward compatibility will be achieved by committing an alias name to the
3.6 release branch.
Ref #110685
1bcf31a874