Backends: Vulkan, SDLGPU3: remove samplers from RenderState. (#9378) Revert part of ac261203a58e7cb3db8c7dbbb9665ed92ffac1b7, 9ee3d731b5934b92da9ebe8ae2442015eac600ac (#8866, #8163, #7998, #7988) since we have a better solution.