This prevents the use of unaligned data types in
vertex formats. These formats are not supported on many
platform.
This simplify the `GPUVertexFormat` class a lot as
we do not need packing shenanigans anymore and just
compute the vertex stride.
The old enums are kept for progressive porting of the
backends and user code.
This will break compatibility with python addons.
TODO:
- [x] Deprecation warning for PyGPU (4.5)
- [x] Deprecate matrix attributes
- [x] Error handling for PyGPU (5.0)
- [x] Backends
- [x] Metal
- [x] OpenGL
- [x] Vulkan
Pull Request: https://projects.blender.org/blender/blender/pulls/138846
e57359726f