metropolis/node: move misplaced packages out of core

abloader, bios_bootcode and minit don't run as part of the core process,
so it doesn't make sense to have them in //metropolis/node/core.
This changes moves these three to //metropolis/node.

Change-Id: I908efb311a138f07a9f1de8e3c23437ff00131ee
Reviewed-on: https://review.monogon.dev/c/monogon/+/4196
Reviewed-by: Tim Windelschmidt <tim@monogon.tech>
Tested-by: Jenkins CI
diff --git a/metropolis/node/core/update/BUILD.bazel b/metropolis/node/core/update/BUILD.bazel
index 8dac43e..532b917 100644
--- a/metropolis/node/core/update/BUILD.bazel
+++ b/metropolis/node/core/update/BUILD.bazel
@@ -4,13 +4,13 @@
     name = "update",
     srcs = ["update.go"],
     embedsrcs = [
-        "//metropolis/node/core/abloader",  #keep
+        "//metropolis/node/abloader",  #keep
     ],
     importpath = "source.monogon.dev/metropolis/node/core/update",
     visibility = ["//visibility:public"],
     deps = [
         "//go/logging",
-        "//metropolis/node/core/abloader/spec",
+        "//metropolis/node/abloader/spec",
         "//metropolis/proto/api",
         "//metropolis/version",
         "//osbase/blockdev",