Duplicate app label causes helm install failure

[adamrlynch]

Describe the Issue
When installing the virtual kubelet chart using Flux v2 there is a duplicate label, apps, that gets created and fails to install. Installation through helm cli is ok as helm is more forgiving than Flux, however, it should be expected that the helm chart wouldn't have duplicate values, which violate YAML syntax.
Steps To Reproduce

1. Run helm template virtual-kubelet-azure-aci https://github.com/virtual-kubelet/azure-aci/raw/gh-pages/charts/virtual-kubelet-azure-aci-1.6.0.tgz
2. Notice invalid value on line 93
   Expected behavior
   The app label would only be used once and be allowed with Flux HelmRelease controller
   Virtual-kubelet version
   1.6.0
   Kubernetes version
   n/a
   Additional context

[adamrlynch]

This looks to be caused by the inclusion of the app in the label list here: https://github.com/virtual-kubelet/azure-aci/blob/817daca1417db318ae426652d0a74136d59768de/charts/virtual-kubelet/templates/_helpers.tpl#L28C1-L28C1 and then again in the deployment file here:

azure-aci/charts/virtual-kubelet/templates/deployment.yaml

Line 20 in 817daca

app: {{ template "vk.fullname" . }}

with two different template values. I'm not familiar enough with how these values are being used elsewhere but since the current setup would override a value anyway the template file should have logic to use one or the other and the separate label removed from the deployment.