common: Use the "hardware" watchdog

A lot of our systems have a "hardware" watchdog (ex: all the Hetzner cloud servers) so let's use it.

added 11 commits

• 41410de7...872de3f4 - 10 commits from branch archlinux:master
• 92c26f3b - common: Use the "hardware" watchdog

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approved this merge request

merged

mentioned in commit f32f3995

mentioned in issue #310 (closed)

mentioned in issue #330