add nuclear option for dep nag not appearing

You can do something like the following to potentially force the dep nag to appear:

```
rm /var/db/ConfigurationProfiles/.cloudConfig*
rm /var/db/ConfigurationProfiles/.noActivationRecord
touch /var/db/ConfigurationProfiles/.cloudConfigHasActivationRecord
/usr/libexec/mdmclient dep nag
```

since this requires root, and should be a last ditch effort, it would be an admin provided override.

Start by locating the code that invokes or handles `/usr/libexec/mdmclient dep nag`, then review how administrative overrides are represented. Verify the documented root-only command sequence can be used as a last-resort override when the dependency nag does not appear.

Written by the indexing model from the issue text.