Describe the bug

On helm chart 6.45.0+, I'm getting the Please define loki.storage.bucketName.ruler error. This is an identical error to #18655 but for the ruler bucket. Unsure if other buckets might have similar failures too.

To Reproduce

Deploy the helm chart with values like the below:

loki:
  storage:
    bucketNames:
      chunks: uds
      admin: uds
    type: s3
...
  rulerConfig:
    storage:
      type: local

Note specifically that the rulerConfig is set to use local storage.

Expected behavior

Chart deploys fine, ruler is using local storage (worked this way in 6.44.0).

Environment:

• Infrastructure: Kubernetes, running on k3d
• Deployment tool: helm, using zarf

Screenshots, Promtail config, or terminal output