====== apt stuck on parallel access ======

After switching all CI images to Debian 12.2, some jobs stuck on ''apt-get update'':
<code>
$ make setup
Get:1 http://deb.debian.org/debian bookworm InRelease [151 kB]
Ign:1 http://deb.debian.org/debian bookworm InRelease
Get:2 http://deb.debian.org/debian bookworm-updates InRelease [55.4 kB]
Get:3 http://deb.debian.org/debian-security bookworm-security InRelease [48.0 kB]
Terminated
</code>

apt-get stuck, and job was terminated by job timeout.

Custom configuration which can be significant:
  * ''apt-cacher-ng'' is used. It can return error or time out.
  * apt is configured to retry 3 times and timeouts after 10 seconds - this can be root cause of issue, see below:

Similar bugs:

  * [[https://bugs.launchpad.net/ubuntu/+source/apt-cacher-ng/+bug/1983856|apt clients stuck on parallel access]]
  * Good analysis of bug is here: [[https://bugs.launchpad.net/ubuntu/+source/apt/+bug/2003851|occasional hanging 'apt-get update' from daily cronjob since Jammy 22.04]]