fixup: Add method to derive Peer Storage encryption key

Author: adi2011

lightning/src/ln/channelmanager.rs

@@ -16359,7 +16359,7 @@ mod tests {
 pub mod bench {
 	use crate::chain::Listen;
 	use crate::chain::chainmonitor::{ChainMonitor, Persist};
-	use crate::sign::{KeysManager, InMemorySigner};
+	use crate::sign::{KeysManager, InMemorySigner, NodeSigner};
 	use crate::events::Event;
 	use crate::ln::channelmanager::{BestBlock, ChainParameters, ChannelManager, PaymentHash, PaymentPreimage, PaymentId, RecipientOnionFields, Retry};
 	use crate::ln::functional_test_utils::*;