Install Theodolite volumes using Helm

Add support (and pre-configuration) for:

• HostPath volumes
• local volumes
• Google Cloud Platform
• Oracle Cloud Infrastructure

Closes #114 (closed)

helm/templates/theodolite/results-volume/pvc.yaml

+{{- if and .Values.operator.resultsVolume.enabled (not .Values.operator.resultsVolume.existingClaim)) -}}
+apiVersion: v1
+kind: PersistentVolumeClaim
+metadata:
+  name: {{ include "theodolite.resultsClaimName" . }}
+spec:
+  {{- if .Values.operator.resultsVolume.storageClassName }}
+  storageClassName: {{ .Values.operator.resultsVolume.storageClassName }}
+  {{- end }}
+  accessModes:
+    - ReadWriteOnce
+    {{- range .Values.operator.resultsVolume.accessModes }}
+    - {{ . | quote }}
+    {{- end }}
+  resources:
+    requests:
+      storage: {{ .Values.operator.resultsVolume.size | quote }}
+{{- end }}
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