Merge pull request #29175 from asmorkalov:as/geometry2

Geometry module #29175

OpenCV Contrib: https://github.com/opencv/opencv_contrib/pull/4129
CI changes: https://github.com/opencv/ci-gha-workflow/pull/313

Continues
- https://github.com/opencv/opencv/pull/28804
- https://github.com/opencv/opencv/pull/29101
- https://github.com/opencv/opencv/pull/29108
- https://github.com/opencv/opencv/pull/28810

Todo for followup PRs:
- [x] Rename doxygen groups
- [x] Fix JS modules layout and whitelists
- [ ] Sort tutorials code/snippets

### 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/geometry/misc/objc/test/Subdiv2DTest.swift

@@ -0,0 +1,23 @@
+//
+//  Subdiv2DTest.swift
+//
+//  Created by Giles Payne on 2020/02/10.
+//
+
+import XCTest
+import OpenCV
+
+class Subdiv2DTest: OpenCVTestCase {
+
+    func testGetTriangleList() {
+        let s2d = Subdiv2D(rect: Rect(x: 0, y: 0, width: 50, height: 50))
+        s2d.insert(pt: Point2f(x: 10, y: 10))
+        s2d.insert(pt: Point2f(x: 20, y: 10))
+        s2d.insert(pt: Point2f(x: 20, y: 20))
+        s2d.insert(pt: Point2f(x: 10, y: 20))
+        var triangles = [Float6]()
+        s2d.getTriangleList(triangleList: &triangles)
+        XCTAssertEqual(2, triangles.count)
+    }
+
+}