GDScript: Properly return value with await on non-coroutine

If the keyword `await` is used without a coroutine, it should still
return the value synchronally.

modules/gdscript/gdscript_vm.cpp

@@ -2098,8 +2098,10 @@ Variant GDScriptFunction::call(GDScriptInstance *p_instance, const Variant **p_a
 					}
 
 					if (result.get_type() != Variant::SIGNAL) {
+						// Not async, return immediately using the target from OPCODE_AWAIT_RESUME.
+						GET_VARIANT_PTR(target, 3);
+						*target = result;
 						ip += 4; // Skip OPCODE_AWAIT_RESUME and its data.
-						// The stack pointer should be the same, so we don't need to set a return value.
 						is_signal = false;
 					} else {
 						sig = result;