IVGCVSW-2095 Add reference implementation and unit tests for SpaceToBatchNd

Change-Id: I27ffebdece6e68460931a44c15b9b029f9fce638
diff --git a/src/backends/reference/RefLayerSupport.cpp b/src/backends/reference/RefLayerSupport.cpp
index 629903e..0902b0f 100644
--- a/src/backends/reference/RefLayerSupport.cpp
+++ b/src/backends/reference/RefLayerSupport.cpp
@@ -434,6 +434,19 @@
                                      &TrueFunc<>);
 }
 
+bool RefLayerSupport::IsSpaceToBatchNdSupported(const TensorInfo& input,
+                                                const TensorInfo& output,
+                                                const SpaceToBatchNdDescriptor& descriptor,
+                                                Optional<std::string&> reasonIfUnsupported) const
+{
+    ignore_unused(output);
+    ignore_unused(descriptor);
+    return IsSupportedForDataTypeRef(reasonIfUnsupported,
+                                     input.GetDataType(),
+                                     &TrueFunc<>,
+                                     &TrueFunc<>);
+}
+
 bool RefLayerSupport::IsSplitterSupported(const TensorInfo& input,
                                           const ViewsDescriptor& descriptor,
                                           Optional<std::string&> reasonIfUnsupported) const