[bot] Automatically pull images from IDOL (#706)

## Summary

This is a PR auto-generated from running `yarn workspace backend run
pull-from-idol-images` and
  `yarn workspace backend run create-idol-images-pr`.

  It updates the new-dti-website with latest images from IDOL.

Please verify that the images look fine on the website and that the
image sizes aren't too large.

Author: dti-github-bot