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/osbase/blkio/BUILD.bazel b/osbase/blkio/BUILD.bazel
new file mode 100644
index 0000000..8b23a34
--- /dev/null
+++ b/osbase/blkio/BUILD.bazel
@@ -0,0 +1,8 @@
+load("@io_bazel_rules_go//go:def.bzl", "go_library")
+
+go_library(
+    name = "blkio",
+    srcs = ["blkio.go"],
+    importpath = "source.monogon.dev/osbase/blkio",
+    visibility = ["//visibility:public"],
+)