store: refactor respSet

We have a need to merge sorted sets of responses into a new one in
different parts of Thanos e.g. rules, targets, etc. So, move the sorted
set logic into a new package.

Signed-off-by: Giedrius Statkevičius <giedrius.statkevicius@vinted.com>

pkg/extprom/http/instrument_client.go

@@ -23,7 +23,7 @@ type ClientMetrics struct {
 
 // NewClientMetrics creates a new instance of ClientMetrics.
 // It will also register the metrics with the included register.
-// This ClientMetrics should be re-used for diff clients with the same purpose.
+// This ClientMetrics should be reused for diff clients with the same purpose.
 // e.g. 1 ClientMetrics should be used for all the clients that talk to Alertmanager.
 func NewClientMetrics(reg prometheus.Registerer) *ClientMetrics {
 	var m ClientMetrics

pkg/query/endpointset.go

@@ -366,7 +366,7 @@ func (e *EndpointSet) Update(ctx context.Context) {
 		if er.HasStoreAPI() && (er.ComponentType() == component.Sidecar || er.ComponentType() == component.Rule) &&
 			stats[component.Sidecar.String()][extLset]+stats[component.Rule.String()][extLset] > 0 {
 
-			level.Warn(e.logger).Log("msg", "found duplicate storeEndpoints producer (sidecar or ruler). This is not advices as it will malform data in in the same bucket",
+			level.Warn(e.logger).Log("msg", "found duplicate storeEndpoints producer (sidecar or ruler). This is not advised as it will malform data in in the same bucket",
 				"address", addr, "extLset", extLset, "duplicates", fmt.Sprintf("%v", stats[component.Sidecar.String()][extLset]+stats[component.Rule.String()][extLset]+1))
 		}
 		stats[er.ComponentType().String()][extLset]++