fix udi leaking in the management api (#15684)

* [WIP] Stop Udi leaking on ConterPicker

* Refined Udi conversion for contentPicker

Cleaned up base construcor usage to move away from the obsoleted one.

* Fixed Udi lieaking in MNTP

* Stopped Udi bleeding for MultiUrlPicker

* Remove unused assignment

* Resolved namespace issue

* Use correct configuration value for MNTP udi parsing

* Turn helper auto props into local helper function to avoid unnecesary serialization

* Remove Newtonsoft.Json from Multi URL picker

* Fixed MNTP configuration serialization

* Changed MNTP editor data from csv guid to EditorEntityReference[]

* Added remarks for the MNTP editor conversion logic

* Reworked MNTPPropertyEditor Unittests

changed intent of one
fixed bug because of 1 rework

* Update OpenApi.json

---------

Co-authored-by: Sven Geusens <sge@umbraco.dk>
Co-authored-by: Elitsa <elm@umbraco.dk>
Co-authored-by: kjac <kja@umbraco.dk>

src/Umbraco.Core/PropertyEditors/MultiNodePickerConfigurationTreeSource.cs

@@ -1,4 +1,5 @@
 using System.Runtime.Serialization;
+using System.Text.Json.Serialization;
 
 namespace Umbraco.Cms.Core.PropertyEditors;
 
@@ -8,15 +9,18 @@ namespace Umbraco.Cms.Core.PropertyEditors;
 [DataContract]
 public class MultiNodePickerConfigurationTreeSource
 {
+    [JsonPropertyName("type")]
     [DataMember(Name = "type")]
     public string? ObjectType { get; set; }
 
+    [JsonPropertyName("query")]
     [DataMember(Name = "query")]
     public string? StartNodeQuery { get; set; }
 
     [DataMember(Name = "dynamicRoot")]
     public DynamicRoot? DynamicRoot { get; set; }
 
+    [JsonPropertyName("id")]
     [DataMember(Name = "id")]
     public Udi? StartNodeId { get; set; }
 }