K8s: expose namespace in frontend_settings (#78090)

Co-authored-by: Todd Treece <360020+toddtreece@users.noreply.github.com>

pkg/api/http_server.go

@@ -17,6 +17,7 @@ import (
 	"github.com/prometheus/client_golang/prometheus/promhttp"
 
 	grafanaapiserver "github.com/grafana/grafana/pkg/services/grafana-apiserver"
+	"github.com/grafana/grafana/pkg/services/grafana-apiserver/endpoints/request"
 
 	"github.com/grafana/grafana/pkg/api/avatar"
 	"github.com/grafana/grafana/pkg/api/routing"
@@ -206,6 +207,7 @@ type HTTPServer struct {
 	starApi              *starApi.API
 	promRegister         prometheus.Registerer
 	clientConfigProvider grafanaapiserver.DirectRestConfigProvider
+	namespacer           request.NamespaceMapper
 }
 
 type ServerOptions struct {
@@ -348,6 +350,7 @@ func ProvideHTTPServer(opts ServerOptions, cfg *setting.Cfg, routeRegister routi
 		starApi:                      starApi,
 		promRegister:                 promRegister,
 		clientConfigProvider:         clientConfigProvider,
+		namespacer:                   request.GetNamespaceMapper(cfg),
 	}
 	if hs.Listener != nil {
 		hs.log.Debug("Using provided listener")