Add Debian/Ubuntu Compatibility#7

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MajorDallas wants to merge 5 commits intorbicker:masterfrom

MajorDallas:ubuntu

Commits on Feb 9, 2022

Commits on Feb 10, 2022

fix: corrects ownership in Ubuntu installs
MajorDallas
committed

Commits on Aug 16, 2022

yum: disable gpg check; apt: always update cache
MajorDallas
committed

Commits on Nov 27, 2023

Adds icinga2_cs_host_groups to host template
MajorDallas
committed