* Adds StatefulSet support
# Conflicts:
# helm/opengist/templates/pvc.yaml
* Adds statefulset support for replicaCount gt 1
* Improves the setup of multiple replicas in a stateful set
* Adds config wrangling logic to the secret template
* Adds shared PV functionality
* Adds missing pvc-shared template
* Adds stateful set and documentation
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Co-authored-by: Guillem Riera <guillem@rieragalm.es>
