Relocate per-cluster app of apps to argocd-apps

[tumido]

I wonder, can we move the app of apps to the argocd-apps repo? So adding a cluster would be only PRs against 2 repos, instead of 3?

Originally posted by @tumido in operate-first/apps#419 (comment)

Right now it's not that straightforward to add a new cluster to ArgoCD. 3 PRs are minimal. If we can remove once step, it would be a huge improvement.

[HumairAK]

I think this is a good idea, but there's the chicken and egg problem. The app-of-apps deploys apps in the argocd-apps repo, but if those are apps are in the argocd-apps repo, then what deploys those apps? an app-of-app-of-apps? I think I would like to avoid that. If the problem is needing to touch too many repos, what we can instead do is:

create a new directory at root called app-of-apps so it would look like:

argocd-apps/
- docs/
- envs/
- app-of-apps/     # new dir
   |- kustomization.yaml

Now we just put all our app-of-apps in this dir and add it to app-of-apps/kustomization.yaml and remote reference this from the continuous-deployment repo? wdyt?

[HumairAK]

stale issue, closing -- reopen in apps repo if needed