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/csi.go b/metropolis/node/kubernetes/csi.go
index dfbd48c..3236bba 100644
--- a/metropolis/node/kubernetes/csi.go
+++ b/metropolis/node/kubernetes/csi.go
@@ -33,9 +33,9 @@
 	"google.golang.org/protobuf/types/known/wrapperspb"
 	pluginregistration "k8s.io/kubelet/pkg/apis/pluginregistration/v1"
 
+	"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/loop"
 	"source.monogon.dev/osbase/supervisor"
 )
@@ -51,7 +51,7 @@
 	KubeletDirectory *localstorage.DataKubernetesKubeletDirectory
 	VolumesDirectory *localstorage.DataVolumesDirectory
 
-	logger logtree.LeveledLogger
+	logger logging.Leveled
 }
 
 func (s *csiPluginServer) Run(ctx context.Context) error {