osbase/logtree.LeveledLogger -> go/logging.Leveled

This factors out the common leveled logger interface out of the logtree.
We want to use the same interface outside of logtree/supervisor usage
within the resolver code, which will be exposed to clients.

Change-Id: I299e76d91e8cefddf8f36f1e58432418c4694df2
Reviewed-on: https://review.monogon.dev/c/monogon/+/3411
Reviewed-by: Tim Windelschmidt <tim@monogon.tech>
Tested-by: Jenkins CI
diff --git a/cloud/agent/BUILD.bazel b/cloud/agent/BUILD.bazel
index db3ee51..7e7614d 100644
--- a/cloud/agent/BUILD.bazel
+++ b/cloud/agent/BUILD.bazel
@@ -15,13 +15,13 @@
     deps = [
         "//cloud/agent/api",
         "//cloud/bmaas/server/api",
+        "//go/logging",
         "//metropolis/node/core/devmgr",
         "//metropolis/node/core/network",
         "//osbase/blockdev",
         "//osbase/bringup",
         "//osbase/build/mkimage/osimage",
         "//osbase/efivarfs",
-        "//osbase/logtree",
         "//osbase/net/proto",
         "//osbase/nvme",
         "//osbase/pki",