Merge pull request #3827 from asmorkalov:as/gapi_migration

Migrate G-API module from main repo to opencv_contrib #3827

Related to https://github.com/opencv/opencv/pull/26469
Required https://github.com/opencv/opencv/pull/26527
CI: https://github.com/opencv/ci-gha-workflow/pull/201

TODO:
- [x]  Python types generator fix
- [x] CI update

### 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
- [ ] 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/gapi/test/render/ftp_render_test.cpp

@@ -0,0 +1,73 @@
+// This file is part of OpenCV project.
+// It is subject to the license terms in the LICENSE file found in the top-level directory
+// of this distribution and at http://opencv.org/license.html.
+//
+// Copyright (C) 2018 Intel Corporation
+
+
+#include "../test_precomp.hpp"
+
+#ifdef HAVE_FREETYPE
+
+#include <random>
+
+#include <opencv2/core/utils/configuration.private.hpp>
+
+#include "backends/render/ft_render.hpp"
+
+namespace opencv_test
+{
+    static std::string getFontPath()
+    {
+        static std::string path = cv::utils::getConfigurationParameterString("OPENCV_TEST_FREETYPE_FONT_PATH",
+                                                                         "/usr/share/fonts/truetype/wqy/wqy-microhei.ttc");
+        return path;
+    }
+
+    inline void RunTest(const std::string& font,
+                        size_t num_iters,
+                        size_t lower_char_code,
+                        size_t upper_char_code)
+    {
+        cv::gapi::wip::draw::FTTextRender ftpr(font);
+
+        std::mt19937 gen{std::random_device()()};
+        std::uniform_int_distribution<int> dist(lower_char_code, upper_char_code);
+        std::uniform_int_distribution<int> dist_size(2, 200);
+
+        for (size_t i = 0; i < num_iters; ++i)
+        {
+            size_t text_size = dist_size(gen);
+            std::wstring text;
+
+            for (size_t j = 0; j < text_size; ++j)
+            {
+                wchar_t c = dist(gen);
+                text += c;
+            }
+
+            int fh       = dist_size(gen);
+            int baseline = 0;
+            cv::Size size;
+
+            ASSERT_NO_THROW(size = ftpr.getTextSize(text, fh, &baseline));
+
+            cv::Mat bmp(size, CV_8UC1, cv::Scalar::all(0));
+            cv::Point org(0, bmp.rows - baseline);
+
+            ASSERT_NO_THROW(ftpr.putText(bmp, text, org, fh));
+        }
+    }
+
+    TEST(FTTextRenderTest, Smoke_Test_Ascii)
+    {
+        RunTest(getFontPath(), 2000, 32, 126);
+    }
+
+    TEST(FTTextRenderTest, Smoke_Test_Unicode)
+    {
+        RunTest(getFontPath(), 2000, 20320, 30000);
+    }
+} // namespace opencv_test
+
+#endif // HAVE_FREETYPE