Add example of helm chart for vllm deployment on k8s (#9199)

Signed-off-by: Maxime Fournioux <55544262+mfournioux@users.noreply.github.com>

examples/chart-helm/templates/job.yaml

@@ -0,0 +1,37 @@
+{{-   if .Values.extraInit  }}
+apiVersion: batch/v1
+kind: Job
+metadata:
+  name: "{{ .Release.Name }}-init-vllm"
+  namespace: {{ .Release.Namespace }}
+spec:
+  ttlSecondsAfterFinished: 100
+  template:
+   metadata:
+     name: init-vllm
+   spec:
+    containers:
+    - name: job-download-model
+      image: {{ include "chart.extraInitImage" . }}
+      command: 
+        - /bin/bash
+      args:
+        - -eucx
+        - aws --endpoint-url $S3_ENDPOINT_URL s3 sync s3://$S3_BUCKET_NAME/$S3_PATH /data
+      env: {{- include "chart.extraInitEnv" . | nindent 8 }}
+      volumeMounts:
+        - name: {{ .Release.Name }}-storage
+          mountPath: /data
+      resources:
+        requests:
+          cpu: 200m
+          memory: 1Gi
+        limits:
+          cpu: 500m
+          memory: 2Gi
+    restartPolicy: OnFailure
+    volumes:
+    - name: {{ .Release.Name }}-storage
+      persistentVolumeClaim:
+        claimName: "{{ .Release.Name }}-storage-claim"
+{{- end }}