void onRequestSent(long correlationId, long timeMs) {
            lastSendTimeMs = timeMs;
            inFlightCorrelationId = OptionalLong.of(correlationId);
            state = State.AWAITING_RESPONSE;
        }
Updates the manager when a request is sent.

@param node the destination of the request
@param correlationId the correlation id of the request
@param timeMs the current time
raft/src/main/java/org/apache/kafka/raft/RequestManager.java