feat: add a 24h repeat interval grafana alert notification policy

[rifisdfds]

Describe your changes

This PR adds a new notification policy to Grafana for alerts. To use you add a label to your alert of "repeat" = "24h" and the alert will use this notification policy and repeat on a 24h interval instead of the default 4h

Issue ticket number and link

Required for https://github.com/dfds/cloudplatform/issues/1816 and https://github.com/dfds/cloudplatform/issues/2116

Checklist before requesting a review

• I have tested changes in my sandbox
• I have added the needed changes in the test/integration folder to apply my changes in QA. Read the guide on adding environment variables in QA
• I have rebased the code to master (or merged in the latest from master)

Is it a new release?

• Apply a release tag release:(major|minor|patch), following semantic versioning in this guide or norelease if there is no changes to the Terraform code