Dispose of GrainCancellationTokenSource

[hendrikdevloed]

Given that

public sealed class GrainCancellationTokenSource : IDisposable

Should

Orleans.SyncWork/src/Orleans.SyncWork/SyncWorker.cs

Line 44 in 47bbfe1

var token = new GrainCancellationTokenSource().Token;

become

        using var cts = new GrainCancellationTokenSource();
        return await Start(request, cts.Token);

?

[Kritner]

I'm not totally sure if this needs to be done or not... would the source stay in scope for the full duration of the sync work progressing? would need to do some testing.