Set gRPC message length to int.MaxValue (#2778)

Author: jviau

src/WebJobs.Extensions.DurableTask/LocalGrpcListener.cs

@@ -54,7 +54,13 @@ public Task StartAsync(CancellationToken cancelToken = default)
             int numAttempts = 1;
             while (numAttempts <= maxAttempts)
             {
-                this.grpcServer = new Server();
+                ChannelOption[] options = new[]
+                {
+                    new ChannelOption(ChannelOptions.MaxReceiveMessageLength, int.MaxValue),
+                    new ChannelOption(ChannelOptions.MaxSendMessageLength, int.MaxValue),
+                };
+
+                this.grpcServer = new Server(options);
                 this.grpcServer.Services.Add(P.TaskHubSidecarService.BindService(new TaskHubGrpcServer(this)));
 
                 int listeningPort = numAttempts == 1 ? DefaultPort : this.GetRandomPort();