fix codeready pv archive fn

[odra]

Verification

• Build the image yourself or use docker.io/odranoel/backup-container:dev
• edit coderedy pv cronjob do use the above image: oc edit cronjob/codeready-pv-backup -n openshift-integreatly-backups
• Run a job from the cronjob: oc create job jobname --from=cronjob/codeready-pv-backup -n openshift-integreatly-backups
• Check if job was successfull
• Download the archive from s3 and check if all workspaces were properly archived

[trepel]

Reviewing

[trepel]

Code looks good to me. I followed the verification steps (even created my own image in docker.io) and the backup job indeed backed up all the workspaces. Merging.