helm: standardize yaml configuration (#15728)

- move application variables under `mastodon` namespace
- restore standard yaml structure for ingress configuration
- move values.yaml.template to values.yaml

chart/templates/job-db-migrate.yaml

@@ -16,7 +16,7 @@ spec:
       restartPolicy: Never
       # ensure we run on the same node as the other rails components; only
       # required when using PVCs that are ReadWriteOnce
-      {{- if or (eq "ReadWriteOnce" .Values.persistence.assets.accessMode) (eq "ReadWriteOnce" .Values.persistence.system.accessMode) }}
+      {{- if or (eq "ReadWriteOnce" .Values.mastodon.persistence.assets.accessMode) (eq "ReadWriteOnce" .Values.mastodon.persistence.system.accessMode) }}
       affinity:
         podAffinity:
           requiredDuringSchedulingIgnoredDuringExecution:
@@ -65,7 +65,7 @@ spec:
                   name: {{ .Release.Name }}-redis
                   key: redis-password
             - name: "PORT"
-              value: {{ .Values.application.web.port | quote }}
+              value: {{ .Values.mastodon.web.port | quote }}
           volumeMounts:
             - name: assets
               mountPath: /opt/mastodon/public/assets