Fix layout from [H,W,C] to [C,H,W]

Fix Aidge::tensorOpencv function to create a tensor from a cv::MAT with a layout of [Channel ,Height, Width]. Fix Tests accordingly.

src/utils/Utils.cpp

@@ -61,9 +61,9 @@ static Aidge::DataType CVtoAidge(const int matDepth) {
 
 std::shared_ptr<Aidge::Tensor> Aidge::tensorOpencv(cv::Mat mat) {
     // Get Mat dims
-    const std::vector<DimSize_t> matDims = std::vector<DimSize_t>({static_cast<DimSize_t>(mat.cols),
+    const std::vector<DimSize_t> matDims = std::vector<DimSize_t>({static_cast<DimSize_t>(mat.channels()),
                                                             static_cast<DimSize_t>(mat.rows),
-                                                            static_cast<DimSize_t>(mat.channels())});
+                                                            static_cast<DimSize_t>(mat.cols)});
     // Get the correct Data Type
     Aidge::DataType type;
     type = CVtoAidge(mat.depth());