anv,hasvk: respect provoking vertex setting on geometry shaders

We need to set the right value on ReorderMode based on the provoking
vertex mode, or the order in which the vertices for tristrip[_adj] are
delivered to the geometry shader doesn't match what Vulkan expects.

Fixes
dEQP-VK.transform_feedback.primitives_generated_query.concurrent.*triangle_strip_with_adjacency*

Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/23243>

src/intel/vulkan/anv_private.h

@@ -3543,6 +3543,7 @@ struct anv_graphics_pipeline {
       uint32_t                                  streamout_state[5];
       uint32_t                                  hs[9];
       uint32_t                                  ds[11];
+      uint32_t                                  gs[10];
    } gfx8;
 };