message: Fix number of parameter calculation
  Summary: Before I was attempting to use a short cut. Now I use the source of truth.
diff: @@ -1160,7 +1160,7 @@ uint32_t emit_instruction_offset_debug_info(
  if (!iodi_metadata.can_safely_use_iodi(it.method)) {
  continue;
  }
  - uint32_t real_param_size = dbg_item->get_param_names().size();
  + uint32_t real_param_size = it.method->get_proto()->get_args()->size();
  uint32_t param_size = per_arity ? real_param_size : 0;
  auto& max_size = param_to_size[param_size];
  auto size = dc->size();
  @@ -1218,7 +1218,7 @@ uint32_t emit_instruction_offset_debug_info(
  offset, code_debug_map);
  if (use_iodi) {
  uint32_t param_size =
  - per_arity ? dbg->get_param_names().size() : max_param;
  + per_arity ? it.method->get_proto()->get_args()->size() : max_param;
  auto offset_it = param_to_offset.find(param_size);
  always_assert_log(offset_it != offset_end,
  "Expected to find param to offset");
  