upd test config

Author: Ubuntu

experiments/configurations/qdrant-single-node.json

@@ -53,21 +53,12 @@
     "connection_params": { "timeout": 30 },
     "search_params": [
       {
-        "parallel": 8,
+        "parallel": 20,
         "config": {
-          "hnsw_ef": 128,
+	  "hnsw_ef": 300,
           "quantization": {
             "rescore": true
           }
-        },
-        "prefetch": {
-          "limit": 400,
-          "params": {
-            "hnsw_ef": 128,
-            "quantization": {
-              "rescore": false
-            }
-          }
         }
       }
     ],