IVGCVSW-2510 Ref workload implementation for Gather operator
 * add implemenentation for GatherQueueDescriptor validate function
 * add FirstInputTypedWorkload to allow type check on the first input tensor only
 * add ref workload implemenentation for float and uint8
 * add Gather layer support in Ref
 * unit tests

Change-Id: I4578a3211f11d24aa29d15bcf7f45b0445bcd1ee
diff --git a/src/backends/reference/workloads/RefWorkloads.hpp b/src/backends/reference/workloads/RefWorkloads.hpp
index 8beb03f..8550ee5 100644
--- a/src/backends/reference/workloads/RefWorkloads.hpp
+++ b/src/backends/reference/workloads/RefWorkloads.hpp
@@ -19,6 +19,7 @@
 #include "RefWorkloadUtils.hpp"
 #include "RefMergerUint8Workload.hpp"
 #include "RefFullyConnectedFloat32Workload.hpp"
+#include "RefGatherWorkload.hpp"
 #include "Softmax.hpp"
 #include "RefMergerFloat32Workload.hpp"
 #include "TensorBufferArrayView.hpp"
@@ -28,6 +29,7 @@
 #include "RefReshapeFloat32Workload.hpp"
 #include "RefDepthwiseConvolution2dUint8Workload.hpp"
 #include "FullyConnected.hpp"
+#include "Gather.hpp"
 #include "RefFloorFloat32Workload.hpp"
 #include "RefSoftmaxFloat32Workload.hpp"
 #include "RefSoftmaxUint8Workload.hpp"