Implement Mipmap generation for the Vulkan backend. This patch implements `GPU_texture_update_mipmap_chain`. Pull Request: https://projects.blender.org/blender/blender/pulls/108699
Implement Mipmap generation for the Vulkan backend. This patch implements `GPU_texture_update_mipmap_chain`. Pull Request: https://projects.blender.org/blender/blender/pulls/108699