[QA][CLI] Add cli tests coverage for post processing service

## Description
Add tests coverage for managing unfinished uploads using postprocessing service

## Using postprocessing service
```
# list upload sessions
> ./ocis/bin/ocis storage-users uploads sessions
Sessions:
+--------------------------------------+--------------------------------------+--------------------------------+--------+--------+--------------------------------------+--------------------------------------+---------------------------+------------+----------------------+-------------+
| Space | Upload Id | Name | Offset | Size | Executant | Owner | Expires | Processing | Scan Date | Scan Result |
+--------------------------------------+--------------------------------------+--------------------------------+--------+--------+--------------------------------------+--------------------------------------+---------------------------+------------+----------------------+-------------+
| 7f2afb67-021a-4553-b711-7c91d294bcac | 42287076-699c-4857-8466-d6ee2b4cf531 | Screenshot from 2025-01-29 | 133251 | 133251 | 7f2afb67-021a-4553-b711-7c91d294bcac | 7f2afb67-021a-4553-b711-7c91d294bcac | 2025-04-29T12:23:11+05:45 | true | 0001-01-01T00:00:00Z | |
| | | 16-32-54.png | | | | | | | | |
| 7f2afb67-021a-4553-b711-7c91d294bcac | 804767f0-3a24-4c23-8e76-922aa731978e | Screenshot from 2025-02-05 | 38000 | 38000 | 7f2afb67-021a-4553-b711-7c91d294bcac | 7f2afb67-021a-4553-b711-7c91d294bcac | 2025-04-29T12:23:11+05:45 | true | 0001-01-01T00:00:00Z | |
| | | 13-01-43.png | | | | | | | | |
| 7f2afb67-021a-4553-b711-7c91d294bcac | b25c1983-cc0b-4281-93bb-b8ccc772a478 | Screenshot from 2025-01-17 | 226645 | 226645 | 7f2afb67-021a-4553-b711-7c91d294bcac | 7f2afb67-021a-4553-b711-7c91d294bcac | 2025-04-29T12:23:11+05:45 | true | 0001-01-01T00:00:00Z | |
| | | 11-42-49.png | | | | | | | | |
+--------------------------------------+--------------------------------------+--------------------------------+--------+--------+--------------------------------------+--------------------------------------+---------------------------+------------+----------------------+-------------+

# resume specific
> ./ocis/bin/ocis postprocessing resume -u 1b403b5c-73b5-479d-a4f3-ba57d7e96a9c

# restart postprocessing for the given uploadI
> ./ocis/bin/ocis postprocessing resume -r -u 5032795f-86a9-44ca-9a88-7b0f288ed7fc

# resume all uploads in the given postprocessing step
POSTPROCESSING_STEPS = virusscan (if you find other steps eligible then please add)
> ./ocis/bin/ocis postprocessing resume # Resumes all uploads where postprocessing is finished, but upload is not finished
> ./ocis/bin/ocis postprocessing resume -s "finished" # Equivalent to the above
> ./ocis/bin/ocis postprocessing resume -s "virusscan" # Resume all uploads currently in virusscan step
```

## How to obtain failed upload
- set `POSTPROCESSING_DELAY ` env and upload resources, and while uploading, restart ocis service using ocis-wrapper. This way you get an unfinished upload
- If you have alternative, then you can use that also

## Test coverage
- [x] resume-specific failed upload https://github.com/owncloud/ocis/pull/11597
- [x] Restart postprocessing for a specific upload https://github.com/owncloud/ocis/pull/11597
- [ ] Resume all failed uploads ~https://github.com/owncloud/ocis/pull/11607~ https://github.com/owncloud/ocis/pull/12600
- [ ] Resume all failed uploads which is at postprocessing step finish https://github.com/owncloud/ocis/pull/11607
- [ ] Resume all failed uploads which is at the postprocessing step virusscan https://github.com/owncloud/ocis/pull/11607