radv: Disable NGG for geometry shaders.

A bunch of remaining issues including some that affect users.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=111248


Fixes: ee21bd74 "radv/gfx10: implement NGG support (VS only)"
Reviewed-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
(cherry picked from commit c037fe5a)