Backport pull request #18011 from jellyfin/release-12.z

Restore [JsonIgnore] on AggregateFolder.Children

Original-merge: 2a43776881

Merged-by: crobibero <cody@robibe.ro>

Backported-by: Cody Robibero <cody@robibe.ro>

MediaBrowser.Controller/Entities/AggregateFolder.cs

@@ -57,6 +57,7 @@ namespace MediaBrowser.Controller.Entities
         // Children caches the resolved items, _childrenIds the ids they were loaded from. Clearing
         // only the former sends the next read back through LoadChildren, which replays the stale
         // id list, so a caller invalidating this folder has to drop both.
+        [JsonIgnore]
         public override IEnumerable<BaseItem> Children
         {
             get => base.Children;