Since we've added SMART alerts, we should install smartd as well.
As most testing happens in VMs, the SMART functionality will only
be enabled when testing==False.

Since current Debian oldstable we are just using the Debian packages.

This reverts commit 9dab0907.

There's no longer a "ntp" system user?

Try a recent Ansible version to deal with targets having Python 3.12.

Require more ICMP probes to fail before the alert triggers.

Expose test artifacts to the Gitlab CI interface

See merge request !310

The artifacts are saved outside of the test container and retrieved
to the CI runner.

Tune nginx proxy_cache_path parameters

See merge request !309

Introduce the 'nginx_cache_params_custom' configuration variable.

Use a simple systemd timer for node-exporter-scripts

See merge request !308

It has better debuggability than the flurry of little wrapped cron
runners, and the scripts are more deploy-friendly.