treewide: introduce osbase package and move things around

All except localregistry moved from metropolis/pkg to osbase,
localregistry moved to metropolis/test as its only used there anyway.

Change-Id: If1a4bf377364bef0ac23169e1b90379c71b06d72
Reviewed-on: https://review.monogon.dev/c/monogon/+/3079
Tested-by: Jenkins CI
Reviewed-by: Serge Bazanski <serge@monogon.tech>
diff --git a/metropolis/cli/dbg/main.go b/metropolis/cli/dbg/main.go
index f087313..3bb762e 100644
--- a/metropolis/cli/dbg/main.go
+++ b/metropolis/cli/dbg/main.go
@@ -32,7 +32,7 @@
 	"k8s.io/kubectl/pkg/cmd/plugin"
 	"k8s.io/kubectl/pkg/cmd/util"
 
-	"source.monogon.dev/metropolis/pkg/logtree"
+	"source.monogon.dev/osbase/logtree"
 
 	apb "source.monogon.dev/metropolis/proto/api"
 	cpb "source.monogon.dev/metropolis/proto/common"