Unit tests: Move last remaining tests onto using the type_graph_utils helpers

Author: ajor

test/test_alignment_calc.cpp

@@ -1,14 +1,10 @@
 #include <gtest/gtest.h>
 
 #include "oi/type_graph/AlignmentCalc.h"
+#include "test/type_graph_utils.h"
 
 using namespace type_graph;
 
-// TODO put in header:
-void test(Pass pass,
-          std::vector<std::reference_wrapper<Type>> types,
-          std::string_view expected);
-
 TEST(AlignmentCalcTest, PrimitiveMembers) {
   auto myclass = Class{Class::Kind::Class, "MyClass", 16};
   auto myint8 = Primitive{Primitive::Kind::Int8};

test/test_topo_sorter.cpp

@@ -4,11 +4,10 @@
 
 #include "oi/type_graph/TopoSorter.h"
 #include "oi/type_graph/Types.h"
+#include "test/type_graph_utils.h"
 
 using namespace type_graph;
 
-Container getVector();  // TODO put in a header
-
 template <typename T>
 using ref = std::reference_wrapper<T>;