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/gapi_compile_args_tests.cpp

@@ -0,0 +1,75 @@
+// 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) 2020 Intel Corporation
+
+
+#include "test_precomp.hpp"
+
+namespace opencv_test
+{
+    struct CustomArg
+    {
+        int number;
+    };
+}
+
+namespace cv
+{
+    namespace detail
+    {
+        template<> struct CompileArgTag<opencv_test::CustomArg>
+        {
+            static const char* tag() { return "org.opencv.test.custom_arg"; }
+        };
+    }
+}
+
+
+namespace opencv_test
+{
+namespace
+{
+G_TYPED_KERNEL(GTestOp, <GMat(GMat)>, "org.opencv.test.test_op")
+{
+    static GMatDesc outMeta(GMatDesc in) { return in; }
+};
+
+GAPI_OCV_KERNEL(GOCVTestOp, GTestOp)
+{
+    static void run(const cv::Mat &/* in */, cv::Mat &/* out */) { }
+};
+} // anonymous namespace
+
+TEST(GetCompileArgTest, PredefinedArgs)
+{
+    cv::GKernelPackage pkg = cv::gapi::kernels<GOCVTestOp>();
+    cv::GCompileArg arg0 { pkg },
+                    arg1 { cv::gapi::use_only { pkg } },
+                    arg2 { cv::graph_dump_path { "fake_path" } };
+
+    GCompileArgs compArgs { arg0, arg1, arg2 };
+
+    auto kernelPkgOpt = cv::gapi::getCompileArg<cv::GKernelPackage>(compArgs);
+    GAPI_Assert(kernelPkgOpt.has_value());
+    EXPECT_NO_THROW(kernelPkgOpt.value().lookup("org.opencv.test.test_op"));
+
+    auto hasUseOnlyOpt = cv::gapi::getCompileArg<cv::gapi::use_only>(compArgs);
+    GAPI_Assert(hasUseOnlyOpt.has_value());
+    EXPECT_NO_THROW(hasUseOnlyOpt.value().pkg.lookup("org.opencv.test.test_op"));
+
+    auto dumpInfoOpt = cv::gapi::getCompileArg<cv::graph_dump_path>(compArgs);
+    GAPI_Assert(dumpInfoOpt.has_value());
+    EXPECT_EQ("fake_path", dumpInfoOpt.value().m_dump_path);
+}
+
+TEST(GetCompileArg, CustomArgs)
+{;
+    cv::GCompileArgs compArgs{ GCompileArg { CustomArg { 7 } } };
+
+    auto customArgOpt = cv::gapi::getCompileArg<CustomArg>(compArgs);
+    GAPI_Assert(customArgOpt.has_value());
+    EXPECT_EQ(7, customArgOpt.value().number);
+}
+} // namespace opencv_test