Add support for output format to `occ files:scan`

[tgoeg]

Steps to reproduce

1.occ files:scan --output=json_pretty -- user

{"reqId":"UPIugY3Zgb2Oo5c0EFiw","level":1,"time":"2021-05-19T10:20:31+00:00","remoteAddr":"","user":"--","app":"admin_audit","method":"","url":"--","message":"Console command executed: files:scan --output=json_pretty -- user","userAgent":"--","version":"19.0.8.1"}
Unknown user 1 user
+---------+-------+--------------+
| Folders | Files | Elapsed time |
+---------+-------+--------------+
| 0       | 0     | 00:00:00     |
+---------+-------+--------------+

occ files:scan --output=json -- user

{"reqId":"71yPn7HwMRty0OuhXFXH","level":1,"time":"2021-05-19T10:20:40+00:00","remoteAddr":"","user":"--","app":"admin_audit","method":"","url":"--","message":"Console command executed: files:scan --output=json -- user","userAgent":"--","version":"19.0.8.1"}
Unknown user 1 user
+---------+-------+--------------+
| Folders | Files | Elapsed time |
+---------+-------+--------------+
| 0       | 0     | 00:00:00     |
+---------+-------+--------------+

occ files:scan --output=plain -- user

{"reqId":"7SR7CkmnEtTrcZXtfYFX","level":1,"time":"2021-05-19T10:20:46+00:00","remoteAddr":"","user":"--","app":"admin_audit","method":"","url":"--","message":"Console command executed: files:scan --output=plain -- user","userAgent":"--","version":"19.0.8.1"}
Unknown user 1 user
+---------+-------+--------------+
| Folders | Files | Elapsed time |
+---------+-------+--------------+
| 0       | 0     | 00:00:00     |
+---------+-------+--------------+

Expected behaviour

The output format should actually change. In conjunction with #27029 this makes parsing for errors even harder.

Server configuration

Nextcloud version:
19.0.8.1

[szaimen]

Is this Issue still valid in NC21.0.3? If not, please close this issue. Thanks! :)

This issue has been automatically marked as stale because it has not had recent activity and seems to be missing some essential information. It will be closed if no further activity occurs. Thank you for your contributions.

[tgoeg]

Sorry for the delay - had to update OS to be able to update NC as well.
Yes, I can confirm it is the same on NC 21.0.3
No matter which output format I choose, the output stays the same.

[szaimen]

Hi, please update to 24.0.9 or better 25.0.3 and report back if it fixes the issue. Thank you!

My goal is to add a label like e.g. 25-feedback to this ticket of an up-to-date major Nextcloud version where the bug could be reproduced. However this is not going to work without your help. So thanks for all your effort!

If you don't manage to reproduce the issue in time and the issue gets closed but you can reproduce the issue afterwards, feel free to create a new bug report with up-to-date information by following this link: https://github.com/nextcloud/server/issues/new?assignees=&labels=bug%2C0.+Needs+triage&template=BUG_REPORT.yml&title=%5BBug%5D%3A+