PublicDashboards: Variables refactor (#73476)

Co-authored-by: Juan Cabanas <juan.cabanas@grafana.com>
Co-authored-by: Ezequiel Victorero <ezequiel.victorero@grafana.com>
Co-authored-by: Ryan McKinley <ryantxu@gmail.com>

pkg/services/pluginsintegration/clientmiddleware/caching_metrics.go

@@ -36,7 +36,7 @@ var ResourceCachingRequestHistogram = prometheus.NewHistogramVec(prometheus.Hist
 }, []string{"plugin_id", "cache"})
 
 func getQueryType(req *contextmodel.ReqContext) string {
-	if req.IsPublicDashboardView {
+	if req.IsPublicDashboardView() {
 		return QueryPubdash
 	}
 	return QueryDashboard