[SETUPLIB][ROSTESTS] Move setuplib unittests to rostests directory.

Addendum to commit 6289183dcd ; fixes our MSVC_x64 builder.

modules/rostests/unittests/setuplib/precomp.h

@@ -0,0 +1,28 @@
+/*
+ * PROJECT:     ReactOS Setup Library - Unit-tests
+ * LICENSE:     GPL-2.0-or-later (https://spdx.org/licenses/GPL-2.0-or-later)
+ * PURPOSE:     Precompiled header
+ * COPYRIGHT:   Copyright 2024 Hermès Bélusca-Maïto <hermes.belusca-maito@reactos.org>
+ */
+
+#pragma once
+
+#include <apitest.h>
+
+/* C Headers */
+#include <stdio.h>
+
+/* PSDK/NDK */
+#define WIN32_NO_STATUS
+#define _INC_WINDOWS
+#define COM_NO_WINDOWS_H
+
+#include <windef.h>
+#include <winbase.h>
+
+#define NTOS_MODE_USER
+#include <ndk/rtlfuncs.h>
+
+#include <setuplib.h>
+
+/* EOF */