fix: env DSN to be included if hydra.dsn is empty

[cr1cr1]

Related Issue or Design Document

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Further comments

hydra-automigrate will fail if using a secret instead of explicit hdyra.dsn because wrong condition in the helm template:

k8s/helm/charts/hydra/templates/job-migration.yaml

Line 60 in 6a22a34

{{- if not (empty ( include "hydra.dsn" . )) }}

This bug was introduced in release v0.25.4

[MOZGIII]

Not passing the DSN is actually a feature: you can pass a custom dynamically constructed DSN vie extraEnv.

[Demonsthere]

closing as stale