Use `--set_test` for both Frames and Video Tests

Nobody has claimed this yet.

Currently one has to call the `save_control_data_from_video("", "SquareToCircleWithlFlag.json")` manually to create the control data. This is quite cumbersome and should be automated with the `--set_test` flag.

#2152 already automated this process but the flag isn't being respected. You have to uncomment a line to update the control data.
```py
# TODO: use when pytest --set_test option
# save_control_data_from_video(path_video_gen, control_data_file[:-5])
check_video_data(path_control_data, str(path_video_gen))
```
The `request` fixture-hack used in `frames_comparison.py` should also be implemented for video tests.

Start with the request fixture hack in frames_comparison.py and the video-test code containing save_control_data_from_video and check_video_data. Run the video tests with pytest --set_test and trace why the flag is not respected. Done means both frame and video tests update control data through the flag without manually uncommenting code.

Written by the indexing model from the issue text.