vault: Do not activate backups on the vault rpc server
vault: Do not activate backups on the vault rpc server

Implementation wise, the swh_server role activates the backup. There is no need
for the vault as the services used by the vault are not local to the node.

SoftwareHeritage/puppet-swh-site,SoftwareHeritage/puppet-swh-site,SoftwareHeritage/puppet-swh-site,SoftwareHeritage/puppet-swh-site,SoftwareHeritage/puppet-swh-site