helm chart: replicaCount should be unset by default

[dex4er]

I would like to be able to disable a number of replicas and NOT set HPA at the same time because I use KEDA, which auto-creates HPAs.

Currently if HPA is not created then replica count is set always to 1 and this setting conflicts with KDEA autoscaler.

With Flux I install it as:

apiVersion: helm.toolkit.fluxcd.io/v2
kind: HelmRelease
metadata:
  name: podinfo
spec:
  releaseName: podinfo
  chart:
    spec:
      chart: podinfo
      sourceRef:
        kind: HelmRepository
        name: podinfo
      reconcileStrategy: ChartVersion
  values:
    hpa:
      ## It disables static number of replicas for Deployment.
      ## However, we use KEDA then HPA is removed in a patch
      enabled: true
  postRenderers:
    - kustomize:
        patches:
          - patch: |-
              $patch: delete
              apiVersion: autoscaling/v2
              kind: HorizontalPodAutoscaler
              metadata:
                name: ANY
            target:
              kind: HorizontalPodAutoscaler

but it looks rather like a nice workaround for the initial problem.