This change migrates the first 2 subdiv shaders to use the ShaderCreateInfo.
Other shaders will follow in separate PRs.
- Should compile when using `WITH_GPU_SHADER_CPP_COMPILATION`
- A `subdiv_` prefix is added only to the functions related to `PosNorLoop`.
But eventually the prefix should also be added to other lib functions.
- Due to Metal restrictions `subdiv_set_vertex_*` is implemented using a
functional paradigma. Our Metal backend only supports `inout` qualifier
on thead local data structures.
Pull Request: https://projects.blender.org/blender/blender/pulls/134218
e39669e3c3