IVGCVSW-3993 Add frontend and reference workload for ComparisonLayer

* Added frontend for ComparisonLayer
* Added RefComparisonWorkload
* Deprecated and removed Equal and Greater layers and workloads
* Updated tests to ensure backward compatibility

Signed-off-by: Aron Virginas-Tar <Aron.Virginas-Tar@arm.com>
Change-Id: Id50c880be1b567c531efff919c0c366d0a71cbe9
diff --git a/src/armnnSerializer/Serializer.cpp b/src/armnnSerializer/Serializer.cpp
index 11f833c..5c9855f 100644
--- a/src/armnnSerializer/Serializer.cpp
+++ b/src/armnnSerializer/Serializer.cpp
@@ -240,6 +240,13 @@
     CreateAnyLayer(fbBatchNormalizationLayer.o, serializer::Layer::Layer_BatchNormalizationLayer);
 }
 
+void SerializerVisitor::VisitComparisonLayer(const armnn::IConnectableLayer* layer,
+                                             const armnn::ComparisonDescriptor& descriptor,
+                                             const char* name)
+{
+    throw armnn::UnimplementedException("SerializerVisitor::VisitComparisonLayer() is not implemented");
+}
+
 // Build FlatBuffer for Constant Layer
 void SerializerVisitor::VisitConstantLayer(const armnn::IConnectableLayer* layer,
                                            const armnn::ConstTensor& input,