Blender uses some vertex attributes that are not (and sometimes
never) supported by a GPU. OpenGL silently converted these changes
but for Metal/Vulkan we need to convert then when uploading the
data.
This PR will write to console invalid usages which we should remove
from Blender code-base. Note it is still possible to create attributes
that still need conversions by using the PyGPU API.
e70e9e3cf9