Rename systemd module to systemd_service

roles/opensearch/tasks/main.yml

roles/php_fpm/handlers/main.yaml

roles/phrik/tasks/main.yml

roles/prometheus/tasks/main.yml

roles/prometheus_exporters/tasks/main.yml

roles/promtail/handlers/main.yml

roles/promtail/tasks/main.yml

roles/quassel/handlers/main.yml

roles/rebuilderd/tasks/main.yml

roles/rebuilderd_worker/handlers/main.yml

roles/rebuilderd_worker/tasks/main.yml

roles/security_tracker/tasks/main.yml

roles/tempo/tasks/main.yml