IVGCVSW-6626 Promote backend headers in backendCommon to  armnn/backends

Move the following header files from backendsCommon to armnn/backends.

* MemCopyWorkload.hpp
* TensorHandle.hpp
* Workload.hpp
* WorkloadData.hpp
* WorkloadFactory.hpp

Replace them with forwarding headers and a pragma deprecation message.
Resolve the deprecation messages in Arm NN code.

Signed-off-by: Colm Donelan <colm.donelan@arm.com>
Change-Id: I47f116b30f86e478c9057795bc518c391a8ae514
diff --git a/src/backends/cl/test/ClContextControlFixture.hpp b/src/backends/cl/test/ClContextControlFixture.hpp
index 14970be..d1b2514 100644
--- a/src/backends/cl/test/ClContextControlFixture.hpp
+++ b/src/backends/cl/test/ClContextControlFixture.hpp
@@ -6,7 +6,7 @@
 #pragma once
 
 #include <cl/ClContextControl.hpp>
-#include <backendsCommon/WorkloadFactory.hpp>
+#include <armnn/backends/WorkloadFactory.hpp>
 
 template<bool ProfilingEnabled>
 struct ClContextControlFixtureBase
diff --git a/src/backends/cl/test/ClCreateWorkloadTests.cpp b/src/backends/cl/test/ClCreateWorkloadTests.cpp
index dd53f38..34914fc 100644
--- a/src/backends/cl/test/ClCreateWorkloadTests.cpp
+++ b/src/backends/cl/test/ClCreateWorkloadTests.cpp
@@ -9,9 +9,9 @@
 #include <armnn/utility/Assert.hpp>
 #include <armnn/utility/IgnoreUnused.hpp>
 #include <armnn/utility/PolymorphicDowncast.hpp>
-#include <backendsCommon/MemCopyWorkload.hpp>
+#include <armnn/backends/MemCopyWorkload.hpp>
 #include <armnnTestUtils/TensorCopyUtils.hpp>
-#include <WorkloadTestUtils.hpp>
+#include <armnnTestUtils/WorkloadTestUtils.hpp>
 
 #include <aclCommon/test/CreateWorkloadClNeon.hpp>
 #include <aclCommon/ArmComputeTensorUtils.hpp>
diff --git a/src/backends/cl/test/ClLayerSupportTests.cpp b/src/backends/cl/test/ClLayerSupportTests.cpp
index 1747cb6..f3df594 100644
--- a/src/backends/cl/test/ClLayerSupportTests.cpp
+++ b/src/backends/cl/test/ClLayerSupportTests.cpp
@@ -10,7 +10,7 @@
 #include <layers/MeanLayer.hpp>
 #include <TensorHelpers.hpp>
 
-#include <backendsCommon/TensorHandle.hpp>
+#include <armnn/backends/TensorHandle.hpp>
 #include <cl/ClWorkloadFactory.hpp>
 #include <cl/test/ClContextControlFixture.hpp>
 #include <backendsCommon/test/IsLayerSupportedTestImpl.hpp>
diff --git a/src/backends/cl/test/DefaultAllocatorTests.cpp b/src/backends/cl/test/DefaultAllocatorTests.cpp
index 3132bc2..6bb11a1 100644
--- a/src/backends/cl/test/DefaultAllocatorTests.cpp
+++ b/src/backends/cl/test/DefaultAllocatorTests.cpp
@@ -7,7 +7,7 @@
 #include <armnn/Descriptors.hpp>
 #include <armnn/Exceptions.hpp>
 #include <armnn/IRuntime.hpp>
-#include <backendsCommon/TensorHandle.hpp>
+#include <armnn/backends/TensorHandle.hpp>
 // Requires the OpenCl backend to be included (GpuAcc)
 #include <cl/ClBackend.hpp>
 #include <doctest/doctest.h>
diff --git a/src/backends/cl/test/Fp16SupportTest.cpp b/src/backends/cl/test/Fp16SupportTest.cpp
index b30a447..da6ea10 100644
--- a/src/backends/cl/test/Fp16SupportTest.cpp
+++ b/src/backends/cl/test/Fp16SupportTest.cpp
@@ -10,7 +10,7 @@
 
 #include <Graph.hpp>
 #include <Optimizer.hpp>
-#include <backendsCommon/TensorHandle.hpp>
+#include <armnn/backends/TensorHandle.hpp>
 #include <armnn/utility/IgnoreUnused.hpp>
 
 #include <doctest/doctest.h>
diff --git a/src/backends/cl/test/OpenClTimerTest.cpp b/src/backends/cl/test/OpenClTimerTest.cpp
index 85fdc81..43387d8 100644
--- a/src/backends/cl/test/OpenClTimerTest.cpp
+++ b/src/backends/cl/test/OpenClTimerTest.cpp
@@ -9,15 +9,15 @@
 
 #include <TensorHelpers.hpp>
 
-#include <backendsCommon/TensorHandle.hpp>
-#include <backendsCommon/WorkloadFactory.hpp>
+#include <armnn/backends/TensorHandle.hpp>
+#include <armnn/backends/WorkloadFactory.hpp>
 
 #include <cl/ClContextControl.hpp>
 #include <cl/ClWorkloadFactory.hpp>
 #include <cl/OpenClTimer.hpp>
 
 #include <armnnTestUtils/TensorCopyUtils.hpp>
-#include <WorkloadTestUtils.hpp>
+#include <armnnTestUtils/WorkloadTestUtils.hpp>
 
 #include <arm_compute/runtime/CL/CLScheduler.h>