Use DEB822 apt format #203
Description
We could consider usage of DEB822 style apt sources.list configuration, like:
# cat /etc/apt/sources.list.d/debian.sources
Types: deb
# http://snapshot.debian.org/archive/debian/20230202T000000Z
URIs: http://deb.debian.org/debian
Suites: unstable
Components: main
Signed-By: /usr/share/keyrings/debian-archive-keyring.gpg
See https://manpages.debian.org/bullseye/apt/sources.list.5.en.html for further information