Monitoring Installation: Remove Prometheus storage volumeMode

[bashofmann]

Summary

Monitoring Installation: Remove Prometheus storage volumeMode form field

Prometheus needs a formatted filesystem for its persistent volume. Setting the volumeMode to anything else but Filesystem (default) does not work.

Fixes #6600

Occurred changes and/or fixed issues

Form field is removed.

Technical notes summary

The default value in the monitoring helm chart and in Kubernetes for the volumMode is Filesystem. The form field is also not present for the Grafana volume configuration.

Areas or cases that should be tested

Monitoring installation and upgrades/reconfiguration, with a persistent volume configured for Prometheus.

I tested installing and upgrading Monitoring with out the field, and the installation succeeds and Prometheus gets a correctly configured persistent volume.

Screenshot/Video

After the removal: