Fix texture mismatch noticed by wowgetoffyourcellphone. Ptolemies were using black Pharaohs instead of white ones.
Unify textures for kushites and ptolemies.
Add back the kush_struct_02.png file with a proper name this time
Some textures fixes from delenda est.
Delete the old textures and use correctly desaturated version of those.
Refs: rP22804 & 24089