graph/db: version fetch chan infos

Add a gossip version parameter to FetchChanInfos in the Store interface
and both KV/SQL implementations. Update the graph builder caller and
refactor related tests.

graph/db/interfaces.go

@@ -282,7 +282,8 @@ type Store interface { //nolint:interfacebloat
 	// edges that exist at the time of the query. This can be used to
 	// respond to peer queries that are seeking to fill in gaps in their
 	// view of the channel graph.
-	FetchChanInfos(chanIDs []uint64) ([]ChannelEdge, error)
+	FetchChanInfos(v lnwire.GossipVersion,
+		chanIDs []uint64) ([]ChannelEdge, error)
 
 	// FetchChannelEdgesByOutpoint attempts to lookup the two directed edges
 	// for the channel identified by the funding outpoint. If the channel