Use of TypeNameHandling.All causes JsonReaderException

### Description
When using TypeNameHandling.All on our serialization settings for dtfx, we receive the following exception:

```
Handler: Exception: Orchestration execution failed due to unhandled exception. : Newtonsoft.Json.JsonReaderException: Unexpected character encountered while parsing value: U. Path '', line 0, position 0.

[TaskFailedException]: Error reading JArray from JsonReader. Current JsonReader item is not an array: StartObject. Path '', line 1, position 1.
[TaskFailedExceptionDeserializationException]: Failed to deserialize exception from TaskActivity: Unhandled exception while executing task: Newtonsoft.Json.JsonReaderException: Error reading JArray from JsonReader. Current JsonReader item is not an array: StartObject. Path '', line 1, position 1.
at Newtonsoft.Json.Linq.JArray.Load(JsonReader reader, JsonLoadSettings settings)
at DurableTask.Core.Common.Utils.ConvertToJArray(String input) in /_/src/DurableTask.Core/Common/Utils.cs:line 210
at DurableTask.Core.AsyncTaskActivity`2.RunAsync(TaskContext context, String input) in /_/src/DurableTask.Core/TaskActivity.cs:line 107
at DurableTask.Core.TaskActivityDispatcher.<>c__DisplayClass14_1.<b__2>d.MoveNext() in /_/src/DurableTask.Core/TaskActivityDispatcher.cs:line 189
```

It looks like this was previously resolved for the Azure Functions durable extensions package https://github.com/Azure/azure-functions-durable-extension/pull/1392 which looks very similar to the TaskActivity code that's throwing here: https://github.com/Azure/durabletask/blob/6f902190fcf7f14d42b07e940f516e47525dbc18/src/DurableTask.Core/TaskActivity.cs#L107.

### Expected behavior
TypeNameHandling.All works and serializes properly.

### Actual behavior
The framework throws the exception above.

### App Details

- **Durable task package version (e.g. v1.8.3)**: 2.13.0

Beginne bei src/DurableTask.Core/TaskActivity.cs Zeile 107, wo die Aktivitätseingabe verarbeitet wird, und vergleiche sie mit dem im Issue verlinkten durable-functions-Fix. Überprüfe Common/Utils.cs Zeile 210 und stelle sicher, dass TypeNameHandling.All nicht länger die gemeldete JsonReaderException oder den Fehler beim Parsen von JArray verursacht. Füge Regressionstests für die Serialisierungseinstellungen hinzu, falls die bestehende Teststruktur dies unterstützt.

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