Add apt autoremove to exeuntu image build process

Discord Message

Author: realami Channel: #feedback Link: https://discord.com/channels/1405685085923049482/1405686161791516873/1455724187350995126

Suggestion: run apt autoremove as part of the exeuntu image build process; as-is, any new VM tells a user of apt install that there are packages that can be autoremoved:

~ $ ssh exe.dev new --name=autoremove
[...]
~ $ ssh -t autoremove.exe.xyz sudo apt -y autoremove
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
The following packages will be REMOVED:
  bridge-utils dns-root-data dnsmasq-base
0 upgraded, 0 newly installed, 3 to remove and 0 not upgraded.
After this operation, 985 kB disk space will be freed.
(Reading database ... 86242 files and directories currently installed.)
Removing bridge-utils (1.7.1-1ubuntu2) ...
Removing dns-root-data (2024071801~ubuntu0.24.04.1) ...
Removing dnsmasq-base (2.90-2ubuntu0.1) ...
Processing triggers for dbus (1.14.10-4ubuntu4.1) ...
Processing triggers for man-db (2.12.0-4build2) ...
Connection to autoremove.exe.xyz closed.