Fix the order of data passed to the host.

[abizjak]

The node expects data before the signature.

https://github.com/Concordium/concordium-node/blob/main/concordium-consensus/src/Concordium/Scheduler.hs#L1454

Checklist

• [ ] My code follows the style of this project.
• [ ] The code compiles without warnings.
• [ ] I have performed a self-review of the changes.
• [ ] I have documented my code, in particular the intent of the hard-to-understand areas.
• [ ] (If necessary) I have updated the CHANGELOG.