add new and improved backup-scripts system

roles/any.tools.backup-scripts/templates/backup.service.j2

@@ -0,0 +1,20 @@
+[Unit]
+Description=Backup: {{ item.name }}
+After=network.target
+
+[Service]
+Type=oneshot
+User={{ item.user | default('root') }}
+Group={{ item.group | default('backups') }}
+
+Environment="RESTIC_REPOSITORY={{ backup_restic_repository }}"
+Environment="RESTIC_PASSWORD_FILE={{ backup_restic_password_file }}"
+Environment="OTEL_EXPORTER_OTLP_ENDPOINT={{ backup_otel_endpoint }}"
+Environment="OTEL_SERVICE_NAME={{ backup_otel_service_name }}"
+
+ExecStart=/usr/bin/otel-cli exec \
+    --name "{{ item.name }}" \
+    --attrs 'backup.type={{ item.type }}' -- /usr/bin/bash {{ backup_scripts_dir }}/{{ item.name }}.backup.sh
+
+[Install]
+WantedBy=multi-user.target