Elasticsearch: Deprecate the usage of the database field in provisioning (#66828)

* update docs and gdev provisioning

* update docs

devenv/datasources_docker.yaml

@@ -71,18 +71,18 @@ datasources:
   - name: gdev-elasticsearch
     type: elasticsearch
     access: proxy
-    database: "[logs-]YYYY.MM.DD"
     url: http://elasticsearch:9200
     jsonData:
+      index: "[logs-]YYYY.MM.DD"
       interval: Daily
       timeField: "@timestamp"
 
   - name: gdev-elasticsearch-filebeat
     type: elasticsearch
     access: proxy
-    database: "[filebeat-]YYYY.MM.DD"
     url: http://elasticsearch:9200
     jsonData:
+      index: "[filebeat-]YYYY.MM.DD"
       interval: Daily
       timeField: "@timestamp"
       timeInterval: "10s"
@@ -92,9 +92,9 @@ datasources:
   - name: gdev-elasticsearch-metricbeat
     type: elasticsearch
     access: proxy
-    database: "[metricbeat-]YYYY.MM.DD"
     url: http://elasticsearch:9200
     jsonData:
+      index: "[metricbeat-]YYYY.MM.DD"
       interval: Daily
       timeField: "@timestamp"
       timeInterval: "10s"