Make upgrades more configurable

[nandi95]

I would only want to run upgrades once a week hence my 50periodic would look like this:

APT::Periodic::Update-Package-Lists "7";
APT::Periodic::Download-Upgradeable-Packages "7";
APT::Periodic::AutocleanInterval "7";
APT::Periodic::Unattended-Upgrade "7";

If I run multiple nodes and I have set restart to true I wouldn't want to have all nodes restarting at the same time so my overrides.conf at /etc/systemd/system/apt-daily-upgrade.timer.d/override.conf would look like this

[Timer]
OnCalendar=
OnCalendar=Sun *-*-* 04:00:00
# if multiple nodes are running, add a random delay to avoid all nodes
# running upgrades at the same time (in case restart is enabled)
RandomizedDelaySec=1h

Furthermore what if I only want to run security updates meaning my 50unattended-upgrades will look like the following

Unattended-Upgrade::Origins-Pattern {
    "origin=Debian,codename=${distro_codename},label=Debian-Security";
    "origin=Debian,codename=${distro_codename}-security,label=Debian-Security";
};

Given the number of configuration options I would perhaps recommend copying in files. files of which the path the user can define.

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[nandi95]

This is still relevant