servlet: ignore IllegalStateException from AsyncContext.complete()

[panchenko]

There are errors logged in case of DEADLINE_EXCEEDED which I would like to avoid.

2025-01-13 11:46:01.942 ERROR [grpc-timer-0]                 SerializingExecutor           Exception while executing runnable io.grpc.servlet.ServletServerStream$Sink$$Lambda$2200/0x0000000801a1cab0@3580f36e
java.lang.IllegalStateException: Calling [asyncComplete()] is not valid for a request with Async state [COMPLETING]
	at org.apache.coyote.AsyncStateMachine.asyncComplete(AsyncStateMachine.java:344)
	at org.apache.coyote.AbstractProcessor.action(AbstractProcessor.java:507)
	at org.apache.coyote.Request.action(Request.java:505)
	at org.apache.catalina.core.AsyncContextImpl.complete(AsyncContextImpl.java:92)
	at io.grpc.servlet.ServletServerStream$Sink.lambda$cancel$2(ServletServerStream.java:303)
	at io.grpc.internal.SerializingExecutor.run(SerializingExecutor.java:133)
	at com.google.common.util.concurrent.DirectExecutor.execute(DirectExecutor.java:31)
	at io.grpc.internal.SerializingExecutor.schedule(SerializingExecutor.java:102)
	at io.grpc.internal.SerializingExecutor.execute(SerializingExecutor.java:95)
	at io.grpc.servlet.ServletServerStream$ServletTransportState.runOnTransportThread(ServletServerStream.java:146)
	at io.grpc.servlet.ServletServerStream$Sink.cancel(ServletServerStream.java:302)
	at io.grpc.internal.AbstractServerStream.cancel(AbstractServerStream.java:148)
	at io.grpc.internal.ServerImpl$ServerTransportListenerImpl$1HandleServerCall$1ServerStreamCancellationListener.cancelled(ServerImpl.java:632)
	at io.grpc.Context$ExecutableListener.run(Context.java:1065)
	at com.google.common.util.concurrent.DirectExecutor.execute(DirectExecutor.java:31)
	at io.grpc.Context$ExecutableListener.deliver(Context.java:1057)
	at io.grpc.Context$CancellableContext.notifyAndClearListeners(Context.java:860)
	at io.grpc.Context$CancellableContext.cancel(Context.java:833)
	at io.grpc.Context$CancellableContext$1CancelOnExpiration.run(Context.java:696)
	at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
	at java.base/java.util.concurrent.FutureTask.run(Unknown Source)
	at java.base/java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(Unknown Source)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
	at java.base/java.lang.Thread.run(Unknown Source)