Scrape duration using prometheus is increasing continuously until restart

### problem

We are using Prometheus to scrape metrics from the management server.
We see a issue that the scrape_duration_seconds metric for the cloudstack job is increasing in slow pace and after ~7-10 days the scrape duration is longer then the configured interval and we get no more metrics.
First time we saw this just doing a time curl towards the mangement server it took 40-50s for metrics to come back.

### versions

CloudStack 4.22.0.0

### The steps to reproduce the bug

1. Start scraping
2. See the scrape_duration_seconds{job="cloudstack"} increasing daily.

### What to do about it?

1. Restart the management server solves the issue, temporarily

Comienza en el endpoint de métricas de Prometheus del servidor de gestión de CloudStack y reproduce el problema consultándolo durante varios días mientras observas scrape_duration_seconds{job="cloudstack"}. Compara el tiempo de respuesta del endpoint con el intervalo de scraping configurado; se considera terminado cuando la duración del scraping deja de aumentar continuamente y las métricas siguen disponibles sin reiniciar el servidor de gestión.

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