chore: switch to modern loki tsdb

examples/grafana-monitoring/volume-data/loki/loki-config.yml

@@ -29,10 +29,10 @@ limits_config:
 
 schema_config:
   configs:
-    - from: 2020-10-24
-      store: boltdb-shipper
+    - from: 2023-07-01
+      store: tsdb
       object_store: filesystem
-      schema: v11
+      schema: v13
       index:
         prefix: index_
         period: 24h