NewtonsoftJsonPatchInputFormatter not working for non generic JsonPatchDocument with System.Text.Json

### Is there an existing issue for this?

- [x] I have searched the existing issues

### Describe the bug

When using System.Text.Json, patches to [dynamic objects](https://learn.microsoft.com/en-us/aspnet/core/web-api/jsonpatch?view=aspnetcore-8.0#dynamic-objects) using the non-generic type JsonPatchDocument are not processed correctly.

The CanRead method of the NewtonsoftJsonPatchInputFormatter class does not allow non-generic types.

With this behavior, patch requests are not handled correctly and the InputFormatter falls back to the default of System.Text.Json, which cannot deserialize this request into a suitable object.

```
public override bool CanRead(InputFormatterContext context)
{
ArgumentNullException.ThrowIfNull(context);

var modelType = context.ModelType;
if (!typeof(IJsonPatchDocument).IsAssignableFrom(modelType) ||
!modelType.IsGenericType)
{
return false;
}

return base.CanRead(context);
}
```

### Expected Behavior

Perhaps the type should be treated explicitly

```
public override bool CanRead(InputFormatterContext context)
{
ArgumentNullException.ThrowIfNull(context);

var modelType = context.ModelType;
if (!typeof(IJsonPatchDocument).IsAssignableFrom(modelType) ||
!(modelType.IsGenericType && modelType.Equals(typeof(JsonPatchDocument))))
{
return false;
}

return base.CanRead(context);
}
```

### Steps To Reproduce

1. [Setup a project like described](https://learn.microsoft.com/en-us/aspnet/core/web-api/jsonpatch?view=aspnetcore-8.0#add-support-for-json-patch-when-using-systemtextjson)
2. [Create Endpoint for dynamic objects](https://learn.microsoft.com/en-us/aspnet/core/web-api/jsonpatch?view=aspnetcore-8.0#dynamic-objects)
3. Send Request to Endpoint

### Exceptions (if any)

_No response_

### .NET Version

.NET 8.0

### Anything else?

_No response_