ci: migrate to mysql + limit cronjobs

manifest.yaml

@@ -9,7 +9,7 @@ data:
   APP_DEBUG: "${APP_APP_DEBUG}"
   APP_URL: "https://${REDIRECT}${APP_DOMAIN}"
   LOG_CHANNEL: "k8s"
-  DB_HOST: "mariadb.common-services"
+  DB_HOST: "${APP_DB_HOST}"
   DB_DATABASE: "${APP_DB_DATABASE}"
   DB_USERNAME: "${APP_DB_USERNAME}"
   DB_PASSWORD: "${APP_DB_PASSWORD}"
@@ -130,6 +130,8 @@ metadata:
   name: ${CI_PROJECT_PATH_SLUG}-cronjob
 spec:
   schedule: "* * * * *"
+  successfulJobsHistoryLimit: 1
+  failedJobsHistoryLimit: 1
   concurrencyPolicy: Forbid
   jobTemplate:
     spec: