Store option "timeRanges" has no effect

[craigfurman]

Describe the bug

Setting Thanos.spec.storeGateway.timeRanges, as documented in https://github.com/banzaicloud/thanos-operator/blob/master/docs/types/thanos_types.md, has no effect.

Steps to reproduce the issue:

Upload the following manifests:

apiVersion: monitoring.banzaicloud.io/v1alpha1
kind: Thanos
metadata:
  name: thanos
spec:
  storeGateway:
    timeRanges:
    - maxTime: -24h
---
apiVersion: monitoring.banzaicloud.io/v1alpha1
kind: StoreEndpoint
metadata:
  name: bucket
spec:
  config:
    mountFrom:
      secretKeyRef:
        key: EXAMPLE
        name: EXAMPLE
  thanos: thanos

Observe that the resultant store pods do not have a --max-time flag

Expected behavior

I'd expect the resultant store pods' Pod.spec.containers.args to have a --max-time=-24h argument.

Screenshots

Additional context

It's possible I've misunderstood the operator code, but it looks like this option does nothing, looking at this setArgs function. We either need to set the flags with reflection on a thanos struct tag, if this is not too awkward to do with the nested struct, or write code to handle this field.