chore(portfolio): clean up prod deployment data

apps/portfolio/overlays/prod-sites/secret-generator.yaml

@@ -0,0 +1,14 @@
+apiVersion: viaduct.ai/v1
+kind: ksops
+metadata:
+  # Specify a name
+  name: registry-credentials-secret-generator
+  annotations:
+    config.kubernetes.io/function: |
+      exec:
+        # if the binary is in your PATH, you can do
+        path: ksops
+        # otherwise, path should be relative to manifest files, like
+        # path: ../../../ksops
+files:
+  - ./secret.enc.yaml