Merge pull request #27551 from sturkmen72:png-improvements

Add enum IMWRITE_PNG_ZLIBBUFFER_SIZE #27551

### Pull Request Readiness Checklist

This patch enables users to set the internal zlib compression buffer size for PNG encoding

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
- [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/imgcodecs/test/test_png.cpp

@@ -12,14 +12,15 @@ TEST(Imgcodecs_Png, write_big)
 {
     const string root = cvtest::TS::ptr()->get_data_path();
     const string filename = root + "readwrite/read.png";
-    const string dst_file = cv::tempfile(".png");
     Mat img;
     ASSERT_NO_THROW(img = imread(filename));
     ASSERT_FALSE(img.empty());
     EXPECT_EQ(13043, img.cols);
     EXPECT_EQ(13917, img.rows);
-    ASSERT_NO_THROW(imwrite(dst_file, img));
-    EXPECT_EQ(0, remove(dst_file.c_str()));
+
+    vector<uchar> buff;
+    ASSERT_NO_THROW(imencode(".png", img, buff, { IMWRITE_PNG_ZLIBBUFFER_SIZE, INT_MAX }));
+    EXPECT_EQ((size_t)816219, buff.size());
 }
 
 TEST(Imgcodecs_Png, encode)