[FEATURE] support multiple query.replica-label params

[roock]

Is your feature request related to a problem? Please describe.
It is possible to specify the query.replica-label multiple times and their usecase is also documented.

It's currently not easily possible to specify the query.replica-label multiple times.

Describe the solution you'd like
It should be possible to specify the param multiple times e.g.

thanos::query::query_replica_label:
  - "replica"
  - "tenant_id"

Describe alternatives you've considered
I'm currently using the following workaround:

---
thanos::query::extra_params:
  query.replica-label: "tenant_id  --query.replica-label=replica"