chore(violation.alert): encode support_group label with ~S

[ArtieReus]

Description

This commit modifies the Helm chart annotations to include the label_replace() function for encoding the support_group label with the ~S. The change impacts the annotations for the Greenhouse dashboard view link, ensuring that the support_group value follows the required encoding format.

Key Changes:

• Used label_replace() to append ~S to the support_group label in the description annotation.
• Improved the clarity of variable usage in the Greenhouse dashboard link by encoding support group labels consistently across deployments.

[sapcc-bot]

Failed to validate the Prometheus rules. Details. Readme.

[majewsky]

label_replace() is a Prometheus function. It needs to be used in the Prometheus expression a few lines above in expr: ....

The interpolation here, as performed by the alertmanager, does not support any templating functions beyond the bare minimum syntax, esp. not any string replacement functions.