[C# Port] Adding new Proxy Update Queue Function. (#1757)

* Adding QueueProxyUpdate.

* Setting to serializer.

* Updates.

* Updating with new ORM model and [model]Operation.

* Fixing return type.

* Working on changes.

* Tested and ready for review.

* Formatting.

* Removing test code.

* Update src/ApiService/Tests/OrmTest.cs

Co-authored-by: Cheick Keita <chkeita@microsoft.com>

* Fixing tests.

* Fixing tests again.

* Asserting null in tests.

* Adding null param.

* Removing whitespace.

* syntax error.

Co-authored-by: Cheick Keita <chkeita@microsoft.com>

src/ApiService/ApiService/Program.cs

@@ -42,6 +42,7 @@ public class Program
             .AddSingleton<IQueue, Queue>()
             .AddSingleton<ICreds>(_ => new Creds())
             .AddSingleton<IStorage, Storage>()
+            .AddSingleton<IProxyOperations, ProxyOperations>()
         )
         .Build();