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/core/pstore.go b/metropolis/node/core/pstore.go
index c8863e5..dfa30f0 100644
--- a/metropolis/node/core/pstore.go
+++ b/metropolis/node/core/pstore.go
@@ -3,8 +3,8 @@
 import (
 	"context"
 
-	"source.monogon.dev/metropolis/pkg/pstore"
-	"source.monogon.dev/metropolis/pkg/supervisor"
+	"source.monogon.dev/osbase/pstore"
+	"source.monogon.dev/osbase/supervisor"
 )
 
 // dumpAndCleanPstore dumps all files accumulated in the pstore into the log