Merge pull request #25463 from WanliZhong:ocvface2YuNet

Change opencv_face_detector related tests and samples from caffe to onnx #25463

Part of https://github.com/opencv/opencv/issues/25314

This PR aims to change the tests related to opencv_face_detector from caffe framework to onnx. Tests in `test_int8_layer.cpp` and `test_caffe_importer.cpp` will be removed in https://github.com/opencv/opencv/pull/25323

### Pull Request Readiness Checklist

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
- [ ] There is a reference to the original bug report and related work
- [ ] There is accuracy test, performance test and test data in opencv_extra repository, if applicable
      Patch to opencv_extra has the same branch name.
- [ ] The feature is well documented and sample code can be built with the project CMake

modules/dnn/test/test_backends.cpp

@@ -372,12 +372,12 @@ TEST_P(DNNTestNetwork, OpenPose_pose_mpi_faster_4_stages)
     expectNoFallbacksFromCUDA(net);
 }
 
-TEST_P(DNNTestNetwork, opencv_face_detector)
+TEST_P(DNNTestNetwork, YuNet)
 {
     Mat img = imread(findDataFile("gpu/lbpcascade/er.png"));
-    Mat inp = blobFromImage(img, 1.0, Size(), Scalar(104.0, 177.0, 123.0), false, false);
-    processNet("dnn/opencv_face_detector.caffemodel", "dnn/opencv_face_detector.prototxt",
-               inp, "detection_out");
+    resize(img, img, Size(320, 320));
+    Mat inp = blobFromImage(img);
+    processNet("dnn/onnx/models/yunet-202303.onnx", "", inp);
     expectNoFallbacksFromIE(net);
 }