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/poddisruptionbudget.yaml

@@ -0,0 +1,7 @@
+apiVersion: policy/v1
+kind: PodDisruptionBudget
+metadata:
+  name: "{{ .Release.Name }}-pdb"
+  namespace: {{ .Release.Namespace }}
+spec:
+  maxUnavailable: {{ default 1 .Values.maxUnavailablePodDisruptionBudget }}