[release-1.5] Loki unit timing-out (CI failure)

Job #12445423339 failed for 3f728c79:

2025/12/15 21:55:03.686960 Unit timeout exceeded: unit Kustomization/loki did not became ready after 5m0s
Timed-out waiting for the following resources to be ready:
IDENTIFIER                                         STATUS     REASON              MESSAGE
Kustomization/sylva-system/thanos                  InProgress                     Kustomization generation is 2, but latest observed generation is -1
╰┄╴HelmRelease/sylva-system/thanos                 InProgress                     HelmRelease generation is 1, but latest observed generation is -1
   ├┄╴┬┄┄[Conditions]
   ┆  ├┄╴Reconciling                               True       Progressing         Running 'install' action with timeout of 5m0s
   ┆  ╰┄╴Ready                                     Unknown    Progressing         Running 'install' action with timeout of 5m0s
   ╰┄╴┬┄┄[Events]
      ╰┄╴2025-12-15 21:50:31                       Normal     HelmChartCreated    Created HelmChart/sylva-system/sylva-system-thanos with SourceRef 'HelmRepository/sylva-system/unit-thanos

We should consider backporting !6205 (merged) to release-1.5