SPEC-7531 Change Code/CryEngine to Code/Legacy (#1634)

* git mv Code\CryEngine Code\Legacy
* redirecting CMakeLists.txt
* fixing uic warning
* Some more CryEngine mentions
* validation scripts

Signed-off-by: Esteban Papp <81431996+amznestebanpapp@users.noreply.github.com>

Code/Legacy/CryCommon/SerializeFwd.h

@@ -0,0 +1,22 @@
+/*
+ * Copyright (c) Contributors to the Open 3D Engine Project
+ * 
+ * SPDX-License-Identifier: Apache-2.0 OR MIT
+ *
+ */
+
+
+// Description : forward declaration of TSerialize
+
+#ifndef CRYINCLUDE_CRYCOMMON_SERIALIZEFWD_H
+#define CRYINCLUDE_CRYCOMMON_SERIALIZEFWD_H
+#pragma once
+
+
+
+template <class T>
+class CSerializeWrapper;
+struct ISerialize;
+typedef CSerializeWrapper<ISerialize> TSerialize;
+
+#endif // CRYINCLUDE_CRYCOMMON_SERIALIZEFWD_H