policy-node: handle nodes-follow-default in handleLinkable

Since nodes may have a target specified in their props, the logic in
cleanupTargetNodeMetadata does not work correctly.

Instead, set target via metadata in handleLinkable, if we see a
reconnectable node with a defined target that is the same as the
configured default target.
7 jobs for target-object-old in 2 minutes and 24 seconds (queued for 1 second)