Note: going by the blob, VFD_INDEX_OFFSET/FD_INSTANCE_START_OFFSET seem
completely unused by indirect draws, so this changes them to only be set
for non-indirect draws (and moves them to the vs_params draw state).
Passes dEQP-VK.draw.shader_draw_parameters.*
Signed-off-by: Jonathan Marek <jonathan@marek.ca>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5635>