anv/apply_pipeline_layout: Apply dynamic offsets in load_ssbo_descriptor

anv/apply_pipeline_layout: Apply dynamic offsets in load_ssbo_descriptor

This function has exactly two call sites.  The first is where we had
these calculations before.  The second only cares about the size of the
SSBO so all the extra code we emit will be dead.  However, NIR should
easily clean that up and this lets us consolidate things a bit better.

Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Caio Marcelo de Oliveira Filho <caio.oliveira@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/8635>