Improve logs regarding failed packet clearing

[ljoss17]

Proposal

The current version of Hermes, v1.10.0, will output the number of packet data queried from the Node when clearing packets, https://github.com/informalsystems/hermes/blob/v1.10.0/crates/relayer/src/link/packet_events.rs#L44.

If there is an issue with the Node, e.g. the data isn't available anymore, the log will simply output an info with the message pulled packet data for 0 events out of X. This can be confusing as it looks like the clearing was successful.

There should be a warning to inform that the endpoint might not have the data.

Acceptance Criteria

• [ ] Improve log when no packet data was pulled

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