multi: start updating various loggers to use the new v2 type

channeldb/migration/log.go

@@ -1,6 +1,6 @@
 package migration
 
-import "github.com/btcsuite/btclog"
+import "github.com/btcsuite/btclog/v2"
 
 // log is a logger that is initialized as disabled.  This means the package will
 // not perform any logging by default until a logger is set.