If a bulk export is triggered via a job, then
we update the metadata field of the job as it
progresses through the records.
https://mattermost.atlassian.net/browse/MM-49374
```release-note
Now you can monitor the progress of the bulk export job
via its metadata field. It is available at
`mmctl export job show <jobID>`.
```
Co-authored-by: Mattermod <mattermod@users.noreply.github.com>