Rename systemd module to systemd_service

roles/alertmanager/tasks/main.yml

roles/arch_boxes_sync/tasks/main.yml

roles/archbuild/handlers/main.yml

roles/archive/tasks/main.yml

roles/archmanweb/tasks/main.yml

roles/archweb/handlers/main.yml

roles/archweb/tasks/main.yml

roles/archwiki/tasks/main.yml

roles/aurweb/handlers/main.yml

roles/aurweb/tasks/main.yml

roles/borg_client/tasks/main.yml

roles/bugbot/tasks/main.yml

roles/bugbuddy/handlers/main.yml

roles/bugbuddy/tasks/main.yml

roles/certbot/tasks/main.yml

roles/common/handlers/main.yml

roles/common/tasks/main.yml

roles/dbscripts/tasks/main.yml

roles/dovecot/tasks/main.yml

roles/dyn_dns/tasks/main.yml