Comment 7 for bug 2060213

so, @paride , I checked and unattended upgrades are definitely not installed on our lxc runners:
```
root@autopkgtest-lxd-xxkcjb:~# apt list --installed | grep upgrade

WARNING: apt does not have a stable CLI interface. Use with caution in scripts.

root@autopkgtest-lxd-xxkcj
```
and I can see it removed in image creation:
```
Removing unattended-upgrades (2.9.1+nmu4ubuntu1) ...
```
However, I see this failure in prod:
```
Purging configuration files for unattended-upgrades (2.9.1+nmu4ubuntu1) ...
dpkg: warning: while removing unattended-upgrades, directory '/var/log/unattended-upgrades' not empty so not removed
```
I created my own image with autopkgtest-build-lxd.

But that seems to be fine, I boot a container from this image, and unattended-upgrades is 100% not installed.

So, the issue isn't unattended-upgrades. What else could be running apt-get in the background?