use node API for free space calculation in versions app (same method as trashbin app)
use node API for free space calculation in versions app (same method as trashbin app)

Signed-off-by: Felix Nieuwenhuizen <9c69098d379350e157eff4ad93150662007b8fb2@tdlrali.com>

nextcloud/server,andreas-p/nextcloud-server,nextcloud/server,andreas-p/nextcloud-server,nextcloud/server,andreas-p/nextcloud-server,andreas-p/nextcloud-server,nextcloud/server,andreas-p/nextcloud-server