[stable/influxdb] Fix backups to GCS (#18274)

stable/influxdb/Chart.yaml

 apiVersion: v1
 name: influxdb
-version: 2.0.0
+version: 2.0.1
 appVersion: 1.7.6
 description: Scalable datastore for metrics, events, and real-time analytics.
 keywords:

stable/influxdb/templates/backup-cronjob.yaml

@@ -62,9 +62,9 @@ spec:
               - name: SRC_URL
                 value: /backups
               - name: DST_URL
-                value: {{ .Values.gcs.backup.destination}}
+                value: {{ .Values.backup.gcs.destination}}
               - name: KEY_FILE
-                value: /var/secrets/google/key.json
+                value: /var/secrets/google/{{ .Values.backup.gcs.serviceAccountSecretKey }}
           {{- end }}
           {{- if .Values.backup.azure }}
           - name: azure-cli

stable/influxdb/values.yaml

@@ -291,9 +291,9 @@ backup:
   annotations: {}
 
   ## Google Cloud Storage
-  ## Secret is expected to have key stored in `key.json` field
   # gcs:
   #    serviceAccountSecret: influxdb-backup-key
+  #    serviceAccountSecretKey: key.json
   #    destination: gs://bucket/influxdb
 
   ## Azure