a9c1d47255
This PR adds several tests to GTest for testing blend states and immediate mode. The immediate mode test are basic and will be extended in the near future. The tests have been developed in order to get the first pixel on screen for the Vulkan backend. In the first phase of this goal we had to validate that everything was working as expected without being able to validate it by starting Blender. Pull Request: https://projects.blender.org/blender/blender/pulls/107834