Merge pull request #23705 from asmorkalov:as/cxx-named-arguments

Re-implement named parameters bindings for Python #23705

Reverted named argument handling from #19156.
Ported new solution from #23224
The port is required to harmonize 4.x -> 5.x merges.

### 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
- [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.
- [ ] The feature is well documented and sample code can be built with the project CMake

modules/python/test/test_misc.py

@@ -738,6 +738,29 @@ class Arguments(NewOpenCVTests):
             )
         )
 
+    def test_named_arguments_without_parameters(self):
+        src = np.ones((5, 5, 3), dtype=np.uint8)
+        arguments_dump, src_copy = cv.utils.copyMatAndDumpNamedArguments(src)
+        np.testing.assert_equal(src, src_copy)
+        self.assertEqual(arguments_dump, 'lambda=-1, sigma=0.0')
+
+    def test_named_arguments_without_output_argument(self):
+        src = np.zeros((2, 2, 3), dtype=np.uint8)
+        arguments_dump, src_copy = cv.utils.copyMatAndDumpNamedArguments(
+            src, lambda_=15, sigma=3.5
+        )
+        np.testing.assert_equal(src, src_copy)
+        self.assertEqual(arguments_dump, 'lambda=15, sigma=3.5')
+
+    def test_named_arguments_with_output_argument(self):
+        src = np.zeros((3, 3, 3), dtype=np.uint8)
+        dst = np.ones_like(src)
+        arguments_dump, src_copy = cv.utils.copyMatAndDumpNamedArguments(
+            src, dst, lambda_=25, sigma=5.5
+        )
+        np.testing.assert_equal(src, src_copy)
+        np.testing.assert_equal(dst, src_copy)
+        self.assertEqual(arguments_dump, 'lambda=25, sigma=5.5')
 
 
 class CanUsePurePythonModuleFunction(NewOpenCVTests):