chore: import upstream snapshot with attribution

modules/video/test/test_main.cpp

@@ -0,0 +1,17 @@
+// 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.
+#include "test_precomp.hpp"
+
+#if defined(HAVE_HPX)
+    #include <hpx/hpx_main.hpp>
+#endif
+
+static
+void initTests()
+{
+    cvtest::addDataSearchEnv("OPENCV_DNN_TEST_DATA_PATH");
+    cvtest::addDataSearchSubDirectory("");  // override "cv" prefix below to access without "../dnn" hacks
+}
+
+CV_TEST_MAIN("cv", initTests())