fix: add loki.format attribute for log ingestion and remove unnecessary labels from exporter configuration

Signed-off-by: zhenyus <zhenyus@mathmast.com>

freeleaps/helm-pkg/authentication/templates/authentication/opentelemetry.yaml

@@ -46,6 +46,9 @@ spec:
           - key: service.namespace
             value: "{{ .Release.Namespace }}"
             action: upsert
+          - key: loki.format
+            action: insert
+            value: json
       batch:
         send_batch_size: 1000
         timeout: 10s
@@ -53,16 +56,6 @@ spec:
     exporters:
       loki:
         endpoint: {{ .Values.logIngest.lokiEndpoint }}
-        labels:
-          resource: 
-            service.name: "service.name"
-            service.namespace: "service.namespace"
-            k8s.pod.name: "k8s.pod.name"
-            k8s.namespace.name: "k8s.namespace.name"
-            k8s.node.name: "k8s.node.name"
-            k8s.deployment.name: "k8s.deployment.name"
-          record:
-            severity: "severity"
     
     logging:
       verbosity: detailed