COMPMID-2779: Add support for generating synthetic int8 graphs.

Adds SyntheticDataTypeMutator, which is responsible for mutating graphs
to int8 and thus enable performance analysis on a wider range of models.

Change-Id: I9a00f0ae59421ab11952660f5115b5dcd9314aaf
Signed-off-by: Georgios Pinitas <georgios.pinitas@arm.com>
Reviewed-on: https://review.mlplatform.org/c/2418
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>
Tested-by: Arm Jenkins <bsgcomp@arm.com>
Reviewed-by: Michele Di Giorgio <michele.digiorgio@arm.com>
diff --git a/src/graph/mutators/DepthConcatSubTensorMutator.cpp b/src/graph/mutators/DepthConcatSubTensorMutator.cpp
index 7994541..30d6700 100644
--- a/src/graph/mutators/DepthConcatSubTensorMutator.cpp
+++ b/src/graph/mutators/DepthConcatSubTensorMutator.cpp
@@ -42,6 +42,11 @@
     return "DepthConcatSubTensorMutator";
 }
 
+IGraphMutator::MutationType DepthConcatSubTensorMutator::type() const
+{
+    return IGraphMutator::MutationType::Backend;
+}
+
 void DepthConcatSubTensorMutator::mutate(Graph &g)
 {
     // Early exit if no Concatenation layers exist in graph