Elasticsearch: Use interval provided by data request in backend (#60480)

* Elasticsearch: Remove interval caulation and use interval provises by grafana

* Remove redundant code

* Adjust snapshot tests

* Update test

* Fix lint

pkg/tsdb/elasticsearch/testdata_request/logs.queries.json

@@ -17,7 +17,8 @@
     "timeField": "testtime",
     "key": "Q-ee8fea91-a4c4-4ded-9827-b362476a4083-0",
     "datasourceId": 39,
-    "intervalMs": 2000,
+    "intervalMs": 1000,
+    "interval": 1000000000,
     "maxDataPoints": 1318
   }
 ]

pkg/tsdb/elasticsearch/testdata_request/metric_multi.queries.json

@@ -15,7 +15,8 @@
       }
     ],
     "timeField": "testtime",
-    "intervalMs": 30000,
+    "intervalMs": 1000,
+    "interval": 1000000000,
     "maxDataPoints": 814
   },
   {
@@ -35,7 +36,8 @@
       }
     ],
     "timeField": "testtime",
-    "intervalMs": 30000,
+    "intervalMs": 1000,
+    "interval": 1000000000,
     "maxDataPoints": 814
   }
 ]