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/test/nanoswitch/socks.go b/metropolis/test/nanoswitch/socks.go
index b8e7107..1230903 100644
--- a/metropolis/test/nanoswitch/socks.go
+++ b/metropolis/test/nanoswitch/socks.go
@@ -5,13 +5,13 @@
 	"fmt"
 	"net"
 
-	"source.monogon.dev/metropolis/pkg/socksproxy"
-	"source.monogon.dev/metropolis/pkg/supervisor"
+	"source.monogon.dev/osbase/socksproxy"
+	"source.monogon.dev/osbase/supervisor"
 )
 
 // SOCKSPort is the port at which nanoswitch listens for SOCKS conenctions.
 //
-// ONCHANGE(//metropolis/test/launch/cluster:cluster.go): port must be kept in sync
+// ONCHANGE(//metropolis/test/launch:cluster.go): port must be kept in sync
 const SOCKSPort uint16 = 1080
 
 // socksHandler implements a socksproxy.Handler which permits and logs