Re-add helm configuration for Azure OIDC federation (#9168)

**What this PR does / why we need it**:

This re-adds the configuration that was removed in
#8515

**Checklist**
- [x] Reviewed the
[`CONTRIBUTING.md`](https://github.com/grafana/loki/blob/main/CONTRIBUTING.md)
guide (**required**)
- [x] Documentation added
- [ ] Tests updated
- [ ] `CHANGELOG.md` updated
- [ ] Changes that require user attention or interaction to upgrade are
documented in `docs/sources/upgrading/_index.md`

docs/sources/installation/helm/reference.md

@@ -1892,6 +1892,7 @@ null
     "accountKey": null,
     "accountName": null,
     "requestTimeout": null,
+    "useFederatedToken": false,
     "useManagedIdentity": false,
     "userAssignedId": null
   },

production/helm/loki/Chart.yaml

@@ -3,7 +3,7 @@ name: loki
 description: Helm chart for Grafana Loki in simple, scalable mode
 type: application
 appVersion: 2.8.0
-version: 5.1.0
+version: 5.2.0
 home: https://grafana.github.io/helm-charts
 sources:
   - https://github.com/grafana/loki

production/helm/loki/README.md

@@ -1,6 +1,6 @@
 # loki
 
-![Version: 5.1.0](https://img.shields.io/badge/Version-5.1.0-informational?style=flat-square) ![Type: application](https://img.shields.io/badge/Type-application-informational?style=flat-square) ![AppVersion: 2.8.0](https://img.shields.io/badge/AppVersion-2.8.0-informational?style=flat-square)
+![Version: 5.2.0](https://img.shields.io/badge/Version-5.2.0-informational?style=flat-square) ![Type: application](https://img.shields.io/badge/Type-application-informational?style=flat-square) ![AppVersion: 2.8.0](https://img.shields.io/badge/AppVersion-2.8.0-informational?style=flat-square)
 
 Helm chart for Grafana Loki in simple, scalable mode
 

production/helm/loki/templates/_helpers.tpl

@@ -240,6 +240,7 @@ azure:
   {{- end }}
   container_name: {{ $.Values.loki.storage.bucketNames.chunks }}
   use_managed_identity: {{ .useManagedIdentity }}
+  use_federated_token: {{ .useFederatedToken }}
   {{- with .userAssignedId }}
   user_assigned_id: {{ . }}
   {{- end }}
@@ -306,6 +307,7 @@ azure:
   {{- end }}
   container_name: {{ $.Values.loki.storage.bucketNames.ruler }}
   use_managed_identity: {{ .useManagedIdentity }}
+  use_federated_token: {{ .useFederatedToken }}
   {{- with .userAssignedId }}
   user_assigned_id: {{ . }}
   {{- end }}

production/helm/loki/values.yaml

@@ -244,6 +244,7 @@ loki:
       accountName: null
       accountKey: null
       useManagedIdentity: false
+      useFederatedToken: false
       userAssignedId: null
       requestTimeout: null
     filesystem: