`max_fetched_series_per_query` limits are not respected for `/series` API for recent data

[alanprot]

Describe the bug
GetSeries and GetLabels API can retrieve informations from Ingesters or/and storegateways (when query_store_for_labels_enabled configuration is enabled).

We have different behaviors if the requests are going to Ingesters and to storegateways.
On the first case, the max_fetched_series_per_query is not enforced at all while in latter case this configuration is enforced:

StoreGateway:

cortex/pkg/querier/blocks_store_queryable.go

Line 625 in 45f043f

limitErr := queryLimiter.AddSeries(cortexpb.FromLabelsToLabelAdapters(s.PromLabels()))

Ingester:

cortex/pkg/distributor/distributor.go

Line 958 in 45f043f

return client.MetricsForLabelMatchers(ctx, req)

This behavior can cause OOM on the queriers as there is a unbounded limit for number of series brought from ingesters.

To Reproduce
Steps to reproduce the behavior:

1. Start Cortex (SHA or version) : any
2. Configure query_store_for_labels_enabled to 10
3. Send more than 10 series
4. call /series with match[]={__name__=~".+"}

Expected behavior
max_fetched_series_per_query limit should be respected on both cases (data coming from StoreGateway or Ingester)

Storage Engine

• Blocks
• Chunks

Additional Context