message: cmake: option to disable GStreamer in G-API
  OPENCV_GAPI_GSTREAMER
diff: @@ -300,7 +300,8 @@ if(HAVE_GAPI_ONEVPL)
  endif()
  endif()
  -if(HAVE_GSTREAMER)
  +ocv_option(OPENCV_GAPI_GSTREAMER "Build G-API with GStreamer support" HAVE_GSTREAMER)
  +if(HAVE_GSTREAMER AND OPENCV_GAPI_GSTREAMER)
  if(TARGET opencv_test_gapi)
  ocv_target_compile_definitions(opencv_test_gapi PRIVATE -DHAVE_GSTREAMER)
  ocv_target_link_libraries(opencv_test_gapi PRIVATE ocv.3rdparty.gstreamer)
  