Fix Simple*PeerManager to not require refs to the UtxoLookup

`UtxoLookup` doesn't strictly need to be referenced from the
`PeerManager`, and in fact the new `GossipVerifier` in
`lightning-block-sync` requires itself to be owned by the
`PeerManager` (for circular type reasons).

This allows us to use `lightning-block-sync`'s `GossipVerifier`
with `SimpleArcPeerManager` in ldk-sample.

Author: TheBlueMatt

lightning/src/ln/peer_handler.rs

@@ -611,7 +611,7 @@ impl Peer {
 pub type SimpleArcPeerManager<SD, M, T, F, C, L> = PeerManager<
 	SD,
 	Arc<SimpleArcChannelManager<M, T, F, L>>,
-	Arc<P2PGossipSync<Arc<NetworkGraph<Arc<L>>>, Arc<C>, Arc<L>>>,
+	Arc<P2PGossipSync<Arc<NetworkGraph<Arc<L>>>, C, Arc<L>>>,
 	Arc<SimpleArcOnionMessenger<L>>,
 	Arc<L>,
 	IgnoringMessageHandler,
@@ -627,12 +627,12 @@ pub type SimpleArcPeerManager<SD, M, T, F, C, L> = PeerManager<
 ///
 /// This is not exported to bindings users as general type aliases don't make sense in bindings.
 pub type SimpleRefPeerManager<
-	'a, 'b, 'c, 'd, 'e, 'f, 'g, 'h, 'i, 'j, 'k, 'l, 'm, 'n, SD, M, T, F, C, L
+	'a, 'b, 'c, 'd, 'e, 'f, 'g, 'h, 'i, 'j, SD, M, T, F, C, L
 > = PeerManager<
 	SD,
-	&'n SimpleRefChannelManager<'a, 'b, 'c, 'd, 'e, 'f, 'g, 'm, M, T, F, L>,
-	&'f P2PGossipSync<&'g NetworkGraph<&'f L>, &'h C, &'f L>,
-	&'i SimpleRefOnionMessenger<'g, 'm, 'n, L>,
+	&'j SimpleRefChannelManager<'a, 'b, 'c, 'd, 'e, 'f, 'g, 'i, M, T, F, L>,
+	&'f P2PGossipSync<&'g NetworkGraph<&'f L>, C, &'f L>,
+	&'h SimpleRefOnionMessenger<'g, 'i, 'j, L>,
 	&'f L,
 	IgnoringMessageHandler,
 	&'c KeysManager