Remove git write-back file .argocd-source-{application}.yaml from git when Application is removed from ArgoCD

[ktzsolt]

Is your feature request related to a problem? Please describe. When an ArgoCD Application gets removed the corresponding git write-back .argocd-source-{application}.yaml file should also be removed from git.

Describe the solution you'd like Image updater should push the deletion of .argocd-source-{application}.yaml files when Application is removed from ArgoCD.

Describe alternatives you've considered I am manually deleting these files but I am afraid that I will delete a file that still belongs to a live Application.