Revert "fix(helm): Use correct serviceName in zone-aware ingester statefulsets (grafana#18558)"

This reverts commit 2706302.

Author: jkroepke

production/helm/loki/CHANGELOG.md

@@ -13,6 +13,7 @@ Entries should include a reference to the pull request that introduced the chang
 
 [//]: # (<AUTOMATED_UPDATES_LOCATOR> : do not remove this line. This locator is used by the CI pipeline to automatically create a changelog entry for each new Loki release. Add other chart versions and respective changelog entries bellow this line.)
 
+- [BUGFIX] Revert "Use correct serviceName in zone-aware ingester statefulsets (#18558) 
 
 ## 6.34.0
 

production/helm/loki/templates/ingester/statefulset-ingester-zone-a.yaml

@@ -27,7 +27,7 @@ spec:
   replicas: {{ $replicas }}
 {{- end }}
   podManagementPolicy: Parallel
-  serviceName: {{ include "loki.ingesterFullname" . }}-zone-a-headless
+  serviceName: {{ include "loki.ingesterFullname" . }}-zone-a
   revisionHistoryLimit: {{ .Values.loki.revisionHistoryLimit }}
   {{- if and (semverCompare ">= 1.23-0" (include "loki.kubeVersion" .)) (.Values.ingester.persistence.enableStatefulSetAutoDeletePVC)  }}
   {{/*

production/helm/loki/templates/ingester/statefulset-ingester-zone-b.yaml

@@ -27,7 +27,7 @@ spec:
   replicas: {{ $replicas }}
 {{- end }}
   podManagementPolicy: Parallel
-  serviceName: {{ include "loki.ingesterFullname" . }}-zone-b-headless
+  serviceName: {{ include "loki.ingesterFullname" . }}-zone-b
   revisionHistoryLimit: {{ .Values.loki.revisionHistoryLimit }}
   {{- if and (semverCompare ">= 1.23-0" (include "loki.kubeVersion" .)) (.Values.ingester.persistence.enableStatefulSetAutoDeletePVC)  }}
   {{/*

production/helm/loki/templates/ingester/statefulset-ingester-zone-c.yaml

@@ -27,7 +27,7 @@ spec:
   replicas: {{ $replicas }}
 {{- end }}
   podManagementPolicy: Parallel
-  serviceName: {{ include "loki.ingesterFullname" . }}-zone-c-headless
+  serviceName: {{ include "loki.ingesterFullname" . }}-zone-c
   revisionHistoryLimit: {{ .Values.loki.revisionHistoryLimit }}
   {{- if and (semverCompare ">= 1.23-0" (include "loki.kubeVersion" .)) (.Values.ingester.persistence.enableStatefulSetAutoDeletePVC)  }}
   {{/*