validate: media-check: Add a way to skip pluggin parsers

validate: media-check: Add a way to skip pluggin parsers

This is useful when you want to check only the demuxer output.

- Keep the information in the media file so that we can launch media-check
  with the proper arguments in the launcher. Update it accordingly.
- Refactor compare_streams to simplify it, which in the end leads to
  reporting all the issues instead of exiting on the first one.