The new Ubuntu Autoinstall deployment mechanism requires the boot files of the extracted ISO image + the ISO image itself. At the moment, the user has to download the ISO image manually, put it in a specific directory (/var/www/html/pub/installation_media/), and extract the files. Then, an Installation Media has to be created with the respective folder.

As a user, I want to provide the ISO image path as an Installation Media. Foreman should take care of downloading the image and providing the extracted files + ISO image for further deployment steps.