unified-storage: Distributor rename to better reflect that it'll be used for search (#107409)

* rename distributor/ring references to "storage-api" to "search-server"

pkg/server/search_server_distributor.go

@@ -0,0 +1,33 @@
+package server
+
+import (
+	"context"
+
+	"github.com/grafana/dskit/services"
+	"github.com/grafana/grafana/pkg/modules"
+	"github.com/grafana/grafana/pkg/services/grpcserver"
+	"github.com/grafana/grafana/pkg/storage/unified/resource"
+	"go.opentelemetry.io/otel"
+)
+
+func (ms *ModuleServer) initSearchServerDistributor() (services.Service, error) {
+	var (
+		distributor = &distributorService{}
+		tracer      = otel.Tracer("index-server-distributor")
+		err         error
+	)
+	distributor.grpcHandler, err = resource.ProvideSearchDistributorServer(ms.cfg, ms.features, ms.registerer, tracer, ms.searchServerRing, ms.searchServerRingClientPool)
+	if err != nil {
+		return nil, err
+	}
+
+	return services.NewBasicService(nil, distributor.running, nil).WithName(modules.SearchServerDistributor), nil
+}
+
+type distributorService struct {
+	grpcHandler grpcserver.Provider
+}
+
+func (d *distributorService) running(ctx context.Context) error {
+	return d.grpcHandler.Run(ctx)
+}