message: Make `Message::FinalitySignature` kind be consensus
diff: @@ -64,7 +64,7 @@ impl Payload for Message {
  Tag::BlockHeaderAndFinalitySignaturesByHeight => MessageKind::BlockTransfer,
  }
  }
  - Message::FinalitySignature(_) => MessageKind::BlockTransfer,
  + Message::FinalitySignature(_) => MessageKind::Consensus,
  }
  }
  }
  