Make replicaCount optional when set value to null #644
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This pr makes the replica count optional in the telegraf Deployment object.
This is useful when you use a HorizontalPodAutoscaler that manages the replica count for you. Especially when you deploy this helm chart with ArgoCD and the auto sync functionality (https://argo-cd.readthedocs.io/en/stable/user-guide/best_practices/#leaving-room-for-imperativeness).
I've successfully tested it locally on my machine with
helm template . --set replicaCount=null