The node operator should receive meaningful messages when data retrieved is not as expected

[dillu24]

Having these kind of messages would inform the node operator that PANIC is not obtaining data in the expected format. To the node operator this may mean that PANIC is not compatible with the node versions he is running.

For some node monitors such as chainlink and evm, the node operator is not informed if unexpected data is retrieved. Therefore, the node operator would think that the data is being retrieved successfully when it isn't.

When performing this fix we should go over each error alert we raise in every monitor to try and understand how we can improve the meaning of these messages and the alert thresholds. In addition to this we must consider adding new and better error alerts.