When Continuation Timeout, TaskCanceledException is thrown, rather than TimeoutException.

[bill2004158]

Describe the bug

https://github.com/rabbitmq/rabbitmq-dotnet-client/blob/main/projects/RabbitMQ.Client/Impl/AsyncRpcContinuations.cs#L180
if (tcs.TrySetCanceled())
{
tcs.TrySetException(GetTimeoutException());
}

if tcs is set as Canceled,
then Exception won't be set.
await tcs.Task will throw TaskCanceledException!
As a result, the caller cannot get TimeoutException.

Reproduction steps

N/A

Expected behavior

throw TimeoutException.

Additional context

No response

[lukebakken]

Maybe this will be addressed in version 8. For now, just catch TaskCanceledException.