Merge pull request #24039 from dkurt:tflite_test_backends

TFLite models on different backends (tests and improvements) #24039

### Pull Request Readiness Checklist

* MaxUnpooling with OpenVINO
* Fully connected with transposed inputs/weights with OpenVINO
* Enable backends tests for TFLite (related to https://github.com/opencv/opencv/issues/23992#issuecomment-1640691722)
* Increase existing tests thresholds

See details at https://github.com/opencv/opencv/wiki/How_to_contribute#making-a-good-pull-request

- [x] I agree to contribute to the project under Apache 2 License.
- [x] To the best of my knowledge, the proposed patch is not based on a code under GPL or another license that is incompatible with OpenCV
- [x] The PR is proposed to the proper branch
- [x] There is a reference to the original bug report and related work
- [x] There is accuracy test, performance test and test data in opencv_extra repository, if applicable
      Patch to opencv_extra has the same branch name.
- [x] The feature is well documented and sample code can be built with the project CMake

modules/dnn/test/test_onnx_importer.cpp

@@ -52,7 +52,7 @@ public:
     }
 
     void testONNXModels(const String& basename, const Extension ext = npy,
-                        const double l1 = 0, const float lInf = 0, const bool useSoftmax = false,
+                        double l1 = 0, double lInf = 0, const bool useSoftmax = false,
                         bool checkNoFallbacks = true, int numInps = 1)
     {
         String onnxmodel = _tf("models/" + basename + ".onnx", required);
@@ -102,6 +102,11 @@ public:
             netSoftmax.setInput(ref);
             ref = netSoftmax.forward();
         }
+        if (backend == DNN_BACKEND_INFERENCE_ENGINE_NGRAPH && target == DNN_TARGET_OPENCL)
+        {
+            l1 = std::max(l1, 1.4e-3);
+            lInf = std::max(lInf, 8e-3);
+        }
         normAssert(ref, out, basename.c_str(), l1 ? l1 : default_l1, lInf ? lInf : default_lInf);
         if (checkNoFallbacks)
             expectNoFallbacksFromIE(net);