### 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 TransportResponseHandler<T> delegate;
        private final Supplier<ThreadContext.StoredContext> contextSupplier;
        private volatile TimeoutHandler handler;
        public ContextRestoreResponseHandler(Supplier<ThreadContext.StoredContext> contextSupplier, TransportResponseHandler<T> delegate) {
            this.delegate = delegate;
            this.contextSupplier = contextSupplier;
        }
        @Override
        public T read(StreamInput in) throws IOException {
            return delegate.read(in);
        }
        @Override