Mention TaskToAsyncResult in "Implement the APM pattern by using tasks"

### Type of issue

Missing information

### Description

In the "Implement the APM pattern by using tasks" section of the "TPL and traditional .NET asynchronous programming" topic, it would be useful to mention the [System.Threading.Tasks.TaskToAsyncResult](https://learn.microsoft.com/dotnet/api/system.threading.tasks.tasktoasyncresult?view=net-8.0) class, and explain how its behaviour differs from the `Task.Factory.StartNew` example.

TaskToAsyncResult is available starting from .NET 8.0. The idea of publishing it for downlevel frameworks too was mentioned in but AFAIK it has not been done.

### Page URL

https://learn.microsoft.com/en-gb/dotnet/standard/parallel-programming/tpl-and-traditional-async-programming

### Content source URL

https://github.com/dotnet/docs/blob/main/docs/standard/parallel-programming/tpl-and-traditional-async-programming.md

### Document Version Independent Id

b7239ee4-3f1b-45da-b671-737fce0536c0

### Platform Id

1a06847a-1003-9404-b237-1562858256c5

### Article author

@adegeo

### Metadata

* ID: fcee7199-2d8d-efe7-d5d0-5599f4f0019d
* PlatformId: 1a06847a-1003-9404-b237-1562858256c5
* Service: **dotnet-fundamentals**

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