radv,aco: add a separate function to compile the trap handler shader

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/32056>

src/amd/compiler/aco_instruction_selection.cpp

@@ -12451,7 +12451,7 @@ dump_sgpr_to_mem(isel_context* ctx, Operand rsrc, Operand data, uint32_t offset)
 }
 
 void
-select_trap_handler_shader(Program* program, struct nir_shader* shader, ac_shader_config* config,
+select_trap_handler_shader(Program* program, ac_shader_config* config,
                            const struct aco_compiler_options* options,
                            const struct aco_shader_info* info, const struct ac_shader_args* args)
 {