tests: add a regression test for 3d2afcf

vlib/v/tests/go_handle_for_functions_returning_array_test.v

@@ -0,0 +1,9 @@
+fn create_random_frames(amount int, pixels int) [][][]int {
+	return [[[amount, pixels]]]
+}
+
+fn test_go_can_be_used_with_functions_returning_arrays() {
+	x := go create_random_frames(2, 2)
+	res := x.wait()
+	assert res == [[[2, 2]]]
+}