Cycles: Cleanup, split array from vector

Those are similar but different types, no reason to keep
their definitions in a single file.

intern/cycles/test/render_graph_finalize_test.cpp

@@ -20,6 +20,7 @@
 #include "render/graph.h"
 #include "render/scene.h"
 #include "render/nodes.h"
+#include "util/util_array.h"
 #include "util/util_logging.h"
 #include "util/util_string.h"
 #include "util/util_vector.h"