message: stats: Use dynamic stat-name for locality_zone_stat_name_ in upstream code.
diff: @@ -149,7 +149,7 @@ protected:
  mutable absl::Mutex metadata_mutex_;
  MetadataConstSharedPtr metadata_ ABSL_GUARDED_BY(metadata_mutex_);
  const envoy::config::core::v3::Locality locality_;
  - Stats::StatNameManagedStorage locality_zone_stat_name_;
  + Stats::StatNameDynamicStorage locality_zone_stat_name_;
  mutable HostStats stats_;
  Outlier::DetectorHostMonitorPtr outlier_detector_;
  HealthCheckHostMonitorPtr health_checker_;
  