[Internal] Benchmark: Adds options for ClientTelemetry TelemetryEndpo…

…int and TelemetryScheduleInSec (#2872)

Right now, Client Telemetry can be only Enabled or disabled in Performance tests. This PR will give flexibility to pass other configurations related to telemetry i.e ScheduledTimeInSec and EndPointURL

Microsoft.Azure.Cosmos.Samples/Tools/Benchmark/BenchmarkConfig.cs

@@ -98,6 +98,12 @@ public class BenchmarkConfig
         [Option(Required = false, HelpText = "Enable Telemetry")]
         public bool EnableTelemetry { get; set; }
 
+        [Option(Required = false, HelpText = "Telemetry Schedule in Seconds")]
+        public int  TelemetryScheduleInSec { get; set; }
+
+        [Option(Required = false, HelpText = "Telemetry Endpoint")]
+        public string TelemetryEndpoint { get; set; }
+
         [Option(Required = false, HelpText = "Endpoint to publish results to")]
         public string ResultsEndpoint { get; set; }
 
@@ -167,13 +173,28 @@ internal Microsoft.Azure.Cosmos.CosmosClient CreateCosmosClient(string accountKe
                 ApplicationName = BenchmarkConfig.UserAgentSuffix,
                 MaxRetryAttemptsOnRateLimitedRequests = 0,
                 MaxRequestsPerTcpConnection = this.MaxRequestsPerTcpConnection,
-                MaxTcpConnectionsPerEndpoint = this.MaxTcpConnectionsPerEndpoint,
-                EnableClientTelemetry = this.EnableTelemetry
+                MaxTcpConnectionsPerEndpoint = this.MaxTcpConnectionsPerEndpoint
             };
 
-            if(this.EnableTelemetry)
+            if (this.EnableTelemetry)
             {
-                Environment.SetEnvironmentVariable(Microsoft.Azure.Cosmos.Telemetry.ClientTelemetryOptions.EnvPropsClientTelemetrySchedulingInSeconds, "1");
+                Environment.SetEnvironmentVariable(
+                    Microsoft.Azure.Cosmos.Telemetry.ClientTelemetryOptions.EnvPropsClientTelemetryEnabled, 
+                    "true");
+
+                if (this.TelemetryScheduleInSec > 0)
+                {
+                    Environment.SetEnvironmentVariable(
+                        Microsoft.Azure.Cosmos.Telemetry.ClientTelemetryOptions.EnvPropsClientTelemetrySchedulingInSeconds, 
+                        Convert.ToString(this.TelemetryScheduleInSec));
+                }
+
+                if (!string.IsNullOrEmpty(this.TelemetryEndpoint))
+                {
+                    Environment.SetEnvironmentVariable(
+                        Microsoft.Azure.Cosmos.Telemetry.ClientTelemetryOptions.EnvPropsClientTelemetryEndpoint, 
+                        this.TelemetryEndpoint);
+                }
             }
 
             if (!string.IsNullOrWhiteSpace(this.ConsistencyLevel))