gl-4.1: add a minmax test
since GL 4.1 changed the texture size limits, let's add a gl4.1 minmax, also adds in some of the GL 4.0 limits for tessellation and texture gather.
since GL 4.1 changed the texture size limits, let's add a gl4.1 minmax, also adds in some of the GL 4.0 limits for tessellation and texture gather.