Bump loki version to 3.0.0

[arukiidou]

• part of #40
  • This is a prerequisite for Replace lokiexporter to otlpexporter.
  • Split this atomically, before activating OTLP

migration

https://grafana.com/docs/loki/latest/setup/migrate/migrate-to-tsdb/

tests

• passed https://github.com/arukiidou/docker-otel-lgtm/pull/1 ok

curl -H 'Content-Type: application/json' -X POST -s 'http://localhost:3100/loki/api/v1/push' --data-raw '{
  "streams": [
    {
      "stream": {
        "ore": "are"
      },
      "values": [
          [ "1715133513448000111" , "this is log" ]
      ]
    }
  ]
}'