I want to configure the Grafana Loki ```
compactor:
working_directory: /data/retention
shared_store: gcs
compaction_interval: 10m
retention_enabled: true
retention_delete_delay: 2h
retention_delete_worker_count: 150
schema_config:
configs:
- from: “2020-07-31”
index:
period: 24h
prefix: loki_index_
object_store: gcs
schema: v11
store: boltdb-shipper