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/node/kubernetes/reconciler/reconciler_test.go b/metropolis/node/kubernetes/reconciler/reconciler_test.go
index b791dbe..f457859 100644
--- a/metropolis/node/kubernetes/reconciler/reconciler_test.go
+++ b/metropolis/node/kubernetes/reconciler/reconciler_test.go
@@ -33,7 +33,7 @@
 	installrbac "k8s.io/kubernetes/pkg/apis/rbac/install"
 	installstorage "k8s.io/kubernetes/pkg/apis/storage/install"
 
-	"source.monogon.dev/metropolis/pkg/supervisor"
+	"source.monogon.dev/osbase/supervisor"
 )
 
 // TestExpectedUniqueNames ensures that all the Expected objects of any