Change volumeBindingMode for cinder storage classes

https://gard.telekom.de/gard/browse/MCSD-804

Changed volumeBindingMode to WaitForFirstConsumer to have get prometheus PV created on the node where

v0.8

update external-dns

cert-manager template is changed to the latest

cert-manager.yaml template ha been changed to the latest.
Used documentation: https://docs.cert-manager.io/en/latest/getting-started/install/kubernetes.html#installing-with-regular-manifests

v0.6

remove image pull secret

cert-manager is upgraded to the latest (v0.9.0) version

cert-manager is upgraded to the latest (v0.9.0) version