Code related to CentOS images cleared
- qemu_upload2openstack.sh updated.
- exec_upload_stage function adapted.
- Info for the RHEL images that were managed during full testing: https://gitlab.cern.ch/linuxsupport/testing/image-ci/-/pipelines/4522251 https://gitlab.cern.ch/linuxsupport/testing/image-ci/-/pipelines/4522403 https://gitlab.cern.ch/linuxsupport/testing/image-ci/-/pipelines/4522573
- Testing mode off.