add a deprecation warning for the rebootcompute step
add a deprecation warning for the rebootcompute step

SUSE-Cloud/automation,vmoravec/automation,SUSE-Cloud/automation,gosipyan/automation,SUSE-Cloud/automation,aspiers/automation,vmoravec/automation,gosipyan/automation,gosipyan/automation,gosipyan/automation,aspiers/automation,aspiers/automation,SUSE-Cloud/automation,vmoravec/automation,aspiers/automation,vmoravec/automation