IVGCVSW-6453 'Move the ArmNN Test Utils code to a physically separate directory'

* Created include/armnnTestUtils directory
* Moved Arm NN test utils files into armnnTestUtils directory

Signed-off-by: Sadik Armagan <sadik.armagan@arm.com>
Change-Id: I03ac54c645c41c52650c4c03b6a58fb1481fef5d
diff --git a/src/backends/backendsCommon/test/layerTests/AdditionTestImpl.hpp b/src/backends/backendsCommon/test/layerTests/AdditionTestImpl.hpp
index b6d6e4a..a66d474 100644
--- a/src/backends/backendsCommon/test/layerTests/AdditionTestImpl.hpp
+++ b/src/backends/backendsCommon/test/layerTests/AdditionTestImpl.hpp
@@ -5,7 +5,7 @@
 
 #pragma once
 
-#include "LayerTestResult.hpp"
+#include <armnnTestUtils/LayerTestResult.hpp>
 
 #include <armnn/backends/IBackendInternal.hpp>
 #include <backendsCommon/WorkloadFactory.hpp>