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/sysctl.go b/metropolis/node/core/sysctl.go
index eb72aa3..01b576c 100644
--- a/metropolis/node/core/sysctl.go
+++ b/metropolis/node/core/sysctl.go
@@ -4,8 +4,8 @@
 	"context"
 	"strconv"
 
-	"source.monogon.dev/metropolis/pkg/supervisor"
-	"source.monogon.dev/metropolis/pkg/sysctl"
+	"source.monogon.dev/osbase/supervisor"
+	"source.monogon.dev/osbase/sysctl"
 )
 
 func nodeSysctls(ctx context.Context) error {