Add pacman_keyring init service

enable pacman-init service

use "one-liner" syntax

remove generated keyring in the installation process

move pacman-init.service to files

use copy instead of template
fix destination

make sure /etc/machine-id is absent
2 jobs for pacman_keyring_init in 34 seconds (queued for 5 seconds)
Status Name Job ID Coverage
  Test
passed ansible-lint #36558

00:00:34

passed terraform-validate #36559

00:00:23