osbase/logtree.LeveledLogger -> go/logging.Leveled

This factors out the common leveled logger interface out of the logtree.
We want to use the same interface outside of logtree/supervisor usage
within the resolver code, which will be exposed to clients.

Change-Id: I299e76d91e8cefddf8f36f1e58432418c4694df2
Reviewed-on: https://review.monogon.dev/c/monogon/+/3411
Reviewed-by: Tim Windelschmidt <tim@monogon.tech>
Tested-by: Jenkins CI
diff --git a/metropolis/node/kubernetes/provisioner.go b/metropolis/node/kubernetes/provisioner.go
index 46fd908..aacb949 100644
--- a/metropolis/node/kubernetes/provisioner.go
+++ b/metropolis/node/kubernetes/provisioner.go
@@ -39,9 +39,9 @@
 	ref "k8s.io/client-go/tools/reference"
 	"k8s.io/client-go/util/workqueue"
 
+	"source.monogon.dev/go/logging"
 	"source.monogon.dev/metropolis/node/core/localstorage"
 	"source.monogon.dev/osbase/fsquota"
-	"source.monogon.dev/osbase/logtree"
 	"source.monogon.dev/osbase/supervisor"
 )
 
@@ -72,7 +72,7 @@
 	pvcInformer          coreinformers.PersistentVolumeClaimInformer
 	pvInformer           coreinformers.PersistentVolumeInformer
 	storageClassInformer storageinformers.StorageClassInformer
-	logger               logtree.LeveledLogger
+	logger               logging.Leveled
 }
 
 // runCSIProvisioner runs the main provisioning machinery. It consists of a