dbb5ad4f86
Renames the three BIND DNS app namespaces `binddns-{auth,resolver,externaldns}` -> `ns-{auth,resolver,externaldns}`.
## Why
Shorter, clearer namespace names for the DNS tiers.
## Changes
- `argocd/applicationsets/platform.yaml`: overlay path registrations renamed (the ApplicationSet derives each app's namespace from its overlay dir name)
- `argocd/projects/platform.yaml`: destination namespaces renamed
## Coupled with
The per-tier PRs (#220/#221/#222) rename the overlay dirs + namespaces + external-dns hostnames to match. No app deploys to a renamed namespace until both this and the tier PR are merged (harmless before then — the ApplicationSet only instantiates apps for existing dirs).
Reviewed-on: #223
Co-authored-by: Ben Vincent <ben@unkin.net>
Co-committed-by: Ben Vincent <ben@unkin.net>