### Description

The `sendRequest` method is asynchronous and notifies a 
`TransportResponseHandler` when it completes the excecution
(successfully or unsuccessfully). 

When opening the connection we only catch `NodeNotConnectedException`
( https://github.com/elastic/elasticsearch/blob/main/server/src/main/java/org/elasticsearch/transport/TransportService.java#L719 ) which is currently fine as no implementations
throw other type of exception however, it'd be best to catch `Exception` here
so the `handler` gets notified of potential exceptions (as opposed to the caller
having to `try/catch` the call to `sendRequest`)
server/src/main/java/org/elasticsearch/transport/TransportService.java
private final long requestId;
        private final long sentTime = threadPool.relativeTimeInMillis();
        private final String action;
        private final DiscoveryNode node;
        volatile Scheduler.Cancellable cancellable;
        TimeoutHandler(long requestId, DiscoveryNode node, String action) {
            this.requestId = requestId;
            this.node = node;
            this.action = action;
        }
        @Override
        public void run() {
            if (responseHandlers.contains(requestId)) {
                long timeoutTime = threadPool.relativeTimeInMillis();
                timeoutInfoHandlers.put(requestId, new TimeoutInfoHolder(node, action, sentTime, timeoutTime));
                
                final Transport.ResponseContext<? extends TransportResponse> holder = responseHandlers.remove(requestId);
                if (holder != null) {
                    assert holder.action().equals(action);
                    assert holder.connection().getNode().equals(node);
                    holder.handler()
                        .handleException(
                            new ReceiveTimeoutTransportException(
                                holder.connection().getNode(),