Create a physical plan for block querying (#2586)

* Create a physical plan for block querying

This PR will reduce the work necessary to query blocks, by planning out
which blocks are fetched from which ingester/store-gateway.

That way queries will potentially not need profile-by-profile
deduplication for blocks that had been deduplicated by the compactor.

* Remove unused field

* Missing `make generate` change

* Signal that there are no profiles streamed

* Generate block metadata correctly

* Improve tracing for block plan

* Request BlockMetadata correctly

Query head first (heads and flushing) and then queriers, this will make
sure that we do not miss a block moving into flushing.

* Forward hints correctly to store-gateway

* Sort iterator properly

* Ensure block metadata repsones are ts bound for ingesters

* Ignore storeQueryAfter for plan building

* Move the signalling to close connction to the right place

* Ensure we only read replica for the correct instance type

* Handle no result profiles

* Log full plan in debug level