## Issue Addressed
NA
## Proposed Changes
Downgrade a `CRIT` to an `ERRO` when there's an `Irrecoverable` error whilst publishing a blinded block.
It's quite common for builders successfully broadcast a block to the network whilst failing to respond to the BN when it publishes a signed, blinded block. The VC is currently raising a `CRIT` when this happens and I think that's excessive.
These changes have the same intent as #4073. In that PR I only managed to remove the `CRIT`s in the BN but missed this one in the VC.
I've also tidied the log messages to:
- Give them all the same title (*"Error whilst producing block"*) to help with grepping.
- Include the `block_slot` so it's easy to look up the slot in an explorer and see if it was actually skipped.
## Additional Info
This PR should not change any logic beyond logging.