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/HeightmapUpdateNotificationBus.h

@@ -0,0 +1,33 @@
+/*
+ * Copyright (c) Contributors to the Open 3D Engine Project
+ * 
+ * SPDX-License-Identifier: Apache-2.0 OR MIT
+ *
+ */
+
+#pragma once
+
+#include <AzCore/EBus/EBus.h>
+#include <AzCore/Math/Aabb.h>
+
+namespace AZ
+{
+    /**
+    * the EBus is used to request information about potential vegetation surfaces
+    */
+    class HeightmapUpdateNotification
+        : public AZ::EBusTraits
+    {
+    public:
+        ////////////////////////////////////////////////////////////////////////
+        // EBusTraits
+        static const AZ::EBusHandlerPolicy HandlerPolicy = AZ::EBusHandlerPolicy::Multiple;
+        static const AZ::EBusAddressPolicy AddressPolicy = AZ::EBusAddressPolicy::Single;
+        ////////////////////////////////////////////////////////////////////////
+
+        // Occurs when the terrain height map is modified.
+        virtual void HeightmapModified(const AZ::Aabb& bounds) = 0;
+    };
+
+    typedef AZ::EBus<HeightmapUpdateNotification> HeightmapUpdateNotificationBus;
+}