Revert "Add postgres-stateful"

This reverts commit 526e676.

Author: ahangarha

.controlplane/templates/gvc.yml

@@ -9,7 +9,7 @@ spec:
  # Password does not matter because host postgres.APP_GVC.cpln.local can only be accessed
  # locally within CPLN GVC, and postgres running on a CPLN workload is something only for a
  # test app that lacks persistence.
- value: 'postgres://the_user:the_password@postgres-stateful.APP_GVC.cpln.local:5432/APP_GVC'
+ value: 'postgres://postgres:password123@postgres.APP_GVC.cpln.local:5432/APP_GVC'
  - name: RAILS_ENV
  value: production
  - name: NODE_ENV