vulkan/meta: Add a concept of rect pipelines

vulkan/meta: Add a concept of rect pipelines

Most hardware supports some sort of rectangle primitive.  This adds a
new VK_PRIMITIVE_TOPOLOGY_RECT_LIST_MESA which will be used by the vast
majority of (if not all) meta commands.  Drivers can key off of of this
to build pipelines differently and implement their own cmd_draw_rects
and cmd_draw_volume hooks or they can map it to TRIANGLE_LIST and use
the provided helpers.

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/24326>