Fix broken dependencies in helm chart and allow using existing secrets in the chart (#18941)

* Add ability to specify an existing Secret (#18139)

Closes #18139

* Allow using secrets with external postgres

* Upgrade CronJob to batch/v1

* Allow using redis.auth.existingSecret

* Helmignore mastodon-*.tgz for easy local development

* Upgrade helm dependencies

* Upgrade postgresql to 11

* Allow putting SMTP password into a secret

* Add optional login to SMTP secret

This to allow setting LOGIN either in values.yaml or
in the secret.

* Switch to bitnami charts full archive

This prevents older versions from disappearing, see
https://github.com/bitnami/charts/issues/10539 for
full context.

Co-authored-by: Ted Tramonte <ted.tramonte@gmail.com>

chart/templates/job-db-migrate.yaml

@@ -50,21 +50,17 @@ spec:
             - configMapRef:
                 name: {{ include "mastodon.fullname" . }}-env
             - secretRef:
-                name: {{ template "mastodon.fullname" . }}
+                name: {{ template "mastodon.secretName" . }}
           env:
             - name: "DB_PASS"
               valueFrom:
                 secretKeyRef:
-                  {{- if .Values.postgresql.enabled }}
-                  name: {{ .Release.Name }}-postgresql
-                  {{- else }}
-                  name: {{ template "mastodon.fullname" . }}
-                  {{- end }}
-                  key: postgresql-password
+                  name: {{ template "mastodon.postgresql.secretName" . }}
+                  key: password
             - name: "REDIS_PASSWORD"
               valueFrom:
                 secretKeyRef:
-                  name: {{ .Release.Name }}-redis
+                  name: {{ template "mastodon.redis.secretName" . }}
                   key: redis-password
             - name: "PORT"
               value: {{ .Values.mastodon.web.port | quote }}