`runner` error logs, destructure id of `undefined`

Chasing a different error I have finally uncovered the origin of: `Cannot destructure property 'id' of '(intermediate value)' as it is undefined.`

of more commonly seen as:
```
{"level":"error","message":"\tFailed: Cannot destructure property 'id' of '(intermediate value)' as it is undefined."}
```

When the `cml runner` flag `--single` is used, the self-hosted runner is started with `ephemeral` and automatically de-registers itself when its one job is complete so when cml goes through the shutdown process to also tries and de-register itself the GitHub API returns no results because it's already gone....