Expose GPUSamplerState to the python API GPU Module

It appears that there is no way right now to modify the sampler state of a GPUTexture using the python api GPU module, a feature previously available using GLTexParameter from the opengl module.

I have taken a small look at the source code, and it seems that all that needs to happen is for

• GPUSamplerState to be exposed

and either for

• pygpu_shader_uniform_sampler to accept a GPUSamplerState object and call GPU_texture_bind_ex instead of GPU_texture_bind if one was passed over
• and/or BPyGPUTexture to expose the ability to set the sampler_state field