Let Deployment use secretRef even when embedded PostgreSQL is enabled

[Donnie]

retool-helm/charts/retool/templates/deployment_backend.yaml

Line 184 in c7d8d30

{{- if .Values.postgresql.enabled }}

It would be great if we could use the config.postgresql.passwordSecretName secretref even when we use the embedded postgres.

The way it is now, any small change to the helm file triggers regeneration of the random password, and everything breaks.

Or one has to hardcode the secret into the helm values file.