allow no encoding/compression on chunks (#2088)
allow no encoding/compression on chunks (#2088)

Signed-off-by: Ed Welch <4e1cbdeb5d169ce17df53d96f1e78e8fa81360a1@grafana.com>
grafana/loki,grafana/loki,grafana/loki,grafana/loki,grafana/loki,grafana/loki