Add volume claim for OCI plus access pod

Volume definition and an access pod are added. Open points are:

• Pod should be converted to a deployment (or restarted on failure, see #132)
• Some documentation should be added

Fixes #128 (closed)

execution/infrastructure/kubernetes/volume-access.yaml

+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: theodolite-results-access
+  labels:
+    app: theodolite-results-access
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      app: theodolite-results-access
+  template:
+    metadata:
+      labels:
+        app: theodolite-results-access
+    spec:
+      containers:
+      - name: theodolite-results-access
+        image: busybox:latest
+        command:
+        - sh
+        - -c
+        - exec tail -f /dev/null
+        volumeMounts:
+        - mountPath: /app/results
+          name: theodolite-pv-storage
+      volumes:
+        - name: theodolite-pv-storage
+          persistentVolumeClaim:
+            claimName: theodolite-pv-claim