Builds Windows nounity and unity

Builds Linux nounity and unity

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

Code/Editor/Util/EditorUtils.h

@@ -13,7 +13,7 @@
 #define CRYINCLUDE_EDITOR_UTIL_EDITORUTILS_H
 #pragma once
 
-
+#include <CryCommon/platform.h>
 #include <IXml.h>
 #include "Util/FileUtil.h"
 #include <Cry_Color.h>

Code/Editor/Util/RefCountBase.h

@@ -14,6 +14,7 @@
 #pragma once
 
 #include <Include/EditorCoreAPI.h>
+#include <CryCommon/ISystem.h>
 
 //! Derive from this class to get reference counting in your class.
 class EDITOR_CORE_API CRefCountBase

Code/Editor/Util/StringHelpers.cpp

@@ -14,11 +14,7 @@
 #include <cctype>
 #include <algorithm>
 
-#if defined(AZ_PLATFORM_WINDOWS)
-#define WIN32_LEAN_AND_MEAN
-#include <windows.h>   // WideCharToMultibyte(), CP_UTF8, etc.
-#endif
-
+#include <AzCore/PlatformIncl.h> // WideCharToMultibyte(), CP_UTF8, etc.
 #include <AzCore/Casting/numeric_cast.h>
 
 static inline char ToLower(const char c)