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/cloud/lib/component/devcerts.go b/cloud/lib/component/devcerts.go
index 32d809c..2a5f60a 100644
--- a/cloud/lib/component/devcerts.go
+++ b/cloud/lib/component/devcerts.go
@@ -13,7 +13,7 @@
 
 	"k8s.io/klog/v2"
 
-	"source.monogon.dev/metropolis/pkg/pki"
+	"source.monogon.dev/osbase/pki"
 )
 
 // GetDevCerts returns paths to this component's development certificate, key