fix: support Loki without object storage

[merll]

📌 Summary

Loki can run without object storage by using local volumes. It then needs to run in "SingleBinary" mode with one instance. This PR implements this, when object storage is not set up. It also removes values which were not actually functional, as they assumed distributed mode would also work with local storage. The latter does not seem to be supported.

🔍 Reviewer Notes

With this change, functionality with object storage should not change. In order to test the different deployment mode, set the platform's object storage provider to "Disabled".

🧹 Checklist

• Code is readable, maintainable, and robust.
• Unit tests added/updated

[svcAPLBot]

Comparison of Helm chart templating output:

data.config.yaml
  ± value change in multiline text (one insert, one deletion)
      
      auth_enabled: true
      bloom_build:
        builder:
      
      [five lines unchanged)]
      
        enabled: false
      common:
        compactor_grpc_address: 'loki-compactor.monitoring.svc.cluster.local:9095'
        path_prefix: /var/loki
    -   replication_factor: 3
    +   replication_factor: 1
        storage:
          s3:
            backoff_config:
              max_period: 5s
      
      [101 lines unchanged)]
      
            server_address: dns+loki-index-gateway-headless.monitoring.svc.cluster.local:9095
        use_thanos_objstore: false
      tracing:
        enabled: false
  
  








data.VERSIONS
  ± value change in multiline text (one insert, one deletion)
      
    - {"api":"main","aplCharts":"main","console":"main","consoleLogin":"main","core":"main","specVersion":48,"tasks":"main","tools":"main"}
    + {"api":"main","aplCharts":"main","console":"main","consoleLogin":"main","core":"main","specVersion":50,"tasks":"main","tools":"main"}
  
  




apps.loki
  - one map entry removed:
    persistence:
      compactor:
        size: 10Gi
      ingester:
        size: 20Gi
      querier:
        size: 10Gi

versions.specVersion
  ± value change
    - 48
    + 50

[ElderMatt]

Tested on cluster, deployed Loki without object storage enabled. Loki is working and running in singlebinary

[Ani1357]

Tested by deploying a cluster with obj sorage disabled.