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/update/BUILD.bazel b/metropolis/node/core/update/BUILD.bazel
index bc5561a..30ca20b 100644
--- a/metropolis/node/core/update/BUILD.bazel
+++ b/metropolis/node/core/update/BUILD.bazel
@@ -11,11 +11,11 @@
     deps = [
         "//metropolis/node/build/mkimage/osimage",
         "//metropolis/node/core/abloader/spec",
-        "//metropolis/pkg/blockdev",
-        "//metropolis/pkg/efivarfs",
-        "//metropolis/pkg/gpt",
-        "//metropolis/pkg/kexec",
-        "//metropolis/pkg/logtree",
+        "//osbase/blockdev",
+        "//osbase/efivarfs",
+        "//osbase/gpt",
+        "//osbase/kexec",
+        "//osbase/logtree",
         "@com_github_cenkalti_backoff_v4//:backoff",
         "@org_golang_google_grpc//codes",
         "@org_golang_google_grpc//status",