fix direct leak from forgotten call to 'delete'

Context

Solve direct leak related to aidge#196 (closed)

unit_tests/operator/Test_ConstantOfShape.cpp

@@ -78,6 +78,7 @@ TEST_CASE("[core/operator] ConstantOfShape_Op(forwardDims)",
       for (DimSize_t i = 0; i < op->getOutput(0)->nbDims(); ++i) {
         CHECK(array_in[i] == op->getOutput(0)->dims().at(i));
       }
+      delete[] array_in;
     }
   }
 }