nir: Make nir_ssa_def_rewrite_uses take an SSA value

This commit replaces the new_src parameter of nir_ssa_def_rewrite_uses()
with an SSA def, removes nir_ssa_def_rewrite_uses_ssa(), and rewrites
all the users as needed.

Reviewed-by: Rhys Perry <pendingchaos02@gmail.com>
Acked-by: Alyssa Rosenzweig <alyssa@collabora.com>
Acked-By: Mike Blumenkrantz <michael.blumenkrantz@gmail.com>
Reviewed-by: Eric Anholt <eric@anholt.net>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/9383>

src/intel/vulkan/anv_nir_lower_multiview.c

@@ -221,7 +221,7 @@ anv_nir_lower_multiview(nir_shader *shader,
             value = build_view_index(&state);
          }
 
-         nir_ssa_def_rewrite_uses(&load->dest.ssa, nir_src_for_ssa(value));
+         nir_ssa_def_rewrite_uses(&load->dest.ssa, value);
 
          nir_instr_remove(&load->instr);
          progress = true;