V14: Migrate nucache to use System.Text.Json (#15685)

* Create system text serializer

* Assign property names with system text

* Use the new serializer

* Impement AutoInterningStringConverter with System.Text.Json

* Implement TextAutoInterningStringKeyCaseInsensitiveDictionaryConverter

* Make CaseInsensitiveDictionaryConverter

* Force datetimes to be read as UTC

* Remove usages of Newtonsoft.Json

* Remove text prefixes

* Remove unused Newtonsoft converter

* Remove more newtonsoft

* Remove duplicate implementation

* Rmove usage of missing class in tests

* Ignore null values

* Fix tests

* Remove Newtonstoft reference from NuCache

---------

Co-authored-by: Elitsa <elm@umbraco.dk>

src/Umbraco.PublishedCache.NuCache/DataSource/PropertyData.cs

@@ -1,6 +1,6 @@
 using System.ComponentModel;
 using System.Runtime.Serialization;
-using Newtonsoft.Json;
+using System.Text.Json.Serialization;
 using Umbraco.Cms.Infrastructure.Serialization;
 
 namespace Umbraco.Cms.Infrastructure.PublishedCache.DataSource;
@@ -14,7 +14,7 @@ public class PropertyData
     [DataMember(Order = 0)]
     [JsonConverter(typeof(AutoInterningStringConverter))]
     [DefaultValue("")]
-    [JsonProperty(DefaultValueHandling = DefaultValueHandling.IgnoreAndPopulate, PropertyName = "c")]
+    [JsonPropertyName("c")]
     public string? Culture
     {
         get => _culture;
@@ -26,7 +26,7 @@ public class PropertyData
     [DataMember(Order = 1)]
     [JsonConverter(typeof(AutoInterningStringConverter))]
     [DefaultValue("")]
-    [JsonProperty(DefaultValueHandling = DefaultValueHandling.IgnoreAndPopulate, PropertyName = "s")]
+    [JsonPropertyName("s")]
     public string? Segment
     {
         get => _segment;
@@ -36,26 +36,25 @@ public class PropertyData
     }
 
     [DataMember(Order = 2)]
-    [JsonProperty("v")]
+    [JsonPropertyName("v")]
     public object? Value { get; set; }
 
     // Legacy properties used to deserialize existing nucache db entries
     [IgnoreDataMember]
-    [JsonProperty("culture")]
     private string LegacyCulture
     {
         set => Culture = value;
     }
 
     [IgnoreDataMember]
-    [JsonProperty("seg")]
+    [JsonPropertyName("seg")]
     private string LegacySegment
     {
         set => Segment = value;
     }
 
     [IgnoreDataMember]
-    [JsonProperty("val")]
+    [JsonPropertyName("val")]
     private object LegacyValue
     {
         set => Value = value;