Do not construct host name in directory path

mkdir does not like the inclusion of ssh hostname in directory name
structure, resulting in below error. To overcome it, do not pass host
names in directory path.

fail
```
rrs@priyasi:~/.../builds-orchestrator (wip/ritesh/drop-mkdir.apertis/v2025dev2)$ ssh -i /var/tmp/archive-aurora.key -p 7711 archive@images.apertis.org mkdir -p archive@images.apertis.org:/srv/images/public/daily/tmp
mkdir: cannot create directory ‘archive@images.apertis.org:’: Permission denied
```

pass

```
rrs@priyasi:~/.../builds-orchestrator (wip/ritesh/drop-mkdir.apertis/v2025dev2)$ ssh -i /var/tmp/archive-aurora.key -p 7711 archive@images.apertis.org mkdir -p /srv/images/public/daily/tmp
20:31  ॐ ♅ ♄ ⛢      


```

Signed-off-by: Ritesh Raj Sarraf <ritesh.sarraf@collabora.com>

.gitlab-ci.yml

@@ -184,7 +184,7 @@ orchestrator-build-origin:
     - chmod 600 "$ARCHIVE_SECRET_FILE"
     - ssh-add "$ARCHIVE_SECRET_FILE"
     - echo Uploading ${source} to ${upload_dest}/${target}/
-    - ssh -oStrictHostKeyChecking=no -p ${UPLOAD_PORT} ${UPLOAD_HOST} mkdir -p ${upload_dest}/${target}/
+    - ssh -oStrictHostKeyChecking=no -p ${UPLOAD_PORT} ${UPLOAD_HOST} mkdir -p ${UPLOAD_ROOT}/${target}/
     - rsync -e "ssh -oStrictHostKeyChecking=no -p $UPLOAD_PORT" -aP ${source} ${upload_dest}/${target}/
   artifacts:
     expire_in: 1d