fix: ensure prometheus duration values are set

Description

The MR sets the scraping intervals manually to ensure we are not running into https://github.com/prometheus-operator/prometheus-operator/issues/5197 under some circumstances.

Supporting information

• https://github.com/prometheus-operator/prometheus-operator/issues/5197

Testing instructions

Steps to test the changes:

1. The Prod DO cluster can be planned and aplied
2. The Prometheus pod is up and running

Dependencies

N/A

Screenshots

N/A

Checklist

If any of the items below is not applicable, do not remove them, but put a check in it.

• All providers include the new feature/change
• All affected providers can provision new clusters
• Unit tests are added/updated
• Documentation is added/updated
• The TOOLS_CONTAINER_IMAGE_VERSION in ci_vars.yml is updated
• The grove-template repository is updated

Additional context

Add any other context about the merge request here.