Do not rsync permissions during restore

After the changes on https://gitlab.cern.ch/paas-tools/okd4-install/-/merge_requests/1139 the restore is failing as rsync is not able to copy permissions from 'gid' (on the backups) to 'setguid (sgid)' (on the current PVCs). This fix adds a --no-perms flag to oc rsync to fix this. This also allows us to always abide by the permissions already set on the PVC & not override them.

Thanks to Jack for his help on debugging this.

velero-restic-restore/restore_pvs.sh

@@ -43,7 +43,8 @@ sleep 60s
 POD_NAME=`oc get pod -l app=drupal,drupalSite="$DRUPALSITE" -n "$NAMESPACE" --sort-by=.metadata.creationTimestamp --field-selector=status.phase==Running -o jsonpath="{.items[-1:].metadata.name}"`
 validateVar "$POD_NAME" "POD_NAME"
 
-oc rsync /restore/ "$POD_NAME":/drupal-data  --delete -n "$NAMESPACE" -c php-fpm
+# Add no-perms to abide by the existing permissions set on the PVC
+oc rsync /restore/ "$POD_NAME":/drupal-data --no-perms=true --delete -n "$NAMESPACE" -c php-fpm
 
 # We remove /root/.cache/ in each iteration to prevent restic backups to run out of memory and fail the cronjobs we run,
 # as we detected this malfunction in our infra.