arb_texture_multisample: require geometry shaders
While not being explicit about it, the ARB_direct_state_access
practically requires geometry shader support for proper
glNamedFramebufferTexture support. The reason boils down to the spec
being written against OpenGL 4.4 spec, while it only requires OpenGL
2.0. The EXT version of the spec, which is written against the OpenGL
2.1 spec *does* explicitly spell out the dependency.
This interpretation also match what Mesa does, so it seems reasonable to
expect.
Reviewed-by: David Heidelberg <david.heidelberg@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/piglit/-/merge_requests/909>