Improve test logic

Retest the failed part of the test and call it recursively.
Remove the number of batches that are automatically divided when testing parameters.

v2rayN/ServiceLib/Global.cs

@@ -72,6 +72,7 @@ namespace ServiceLib
         public const string LocalAppData = "V2RAYN_LOCAL_APPLICATION_DATA";
         public const string V2RayLocalAsset = "V2RAY_LOCATION_ASSET";
         public const string XrayLocalAsset = "XRAY_LOCATION_ASSET";
+        public const int SpeedTestPageSize = 1000;
 
         public static readonly List<string> IEProxyProtocols =
         [