Update sync_kobocat_xform command

[joshuaberetta]

Minor fix to #2675

[noliveleger]

I cannot comment on the line I would like to, but I would remove the condition if username on line 583.
I would expect the media files to be synced when I called --sync-kobocat-form-media,
even if it's all files. Because it's false by default, if the user adds the option, we should assume they know what they are doing.
With the current behaviour, nothing happens if the username is not provided.
What do you think?

Morever, I think we should pass the verbosity to both sub commands populate_kc_xform_kpi_asset_uid and sync-kobocat-form-media.

[joshuaberetta]

Those are good points 👍 I'll make the changes.