MM-58092 Add feature flag and setting for client performance metrics (#26942)

* MM-58092 Add feature flag and setting for client performance metrics

* Fix incorrect field name

server/config/client.go

@@ -187,6 +187,7 @@ func GenerateClientConfig(c *model.Config, telemetryID string, license *model.Li
 
 		if *license.Features.Cluster {
 			props["EnableMetrics"] = strconv.FormatBool(*c.MetricsSettings.Enable)
+			props["EnableClientMetrics"] = strconv.FormatBool(c.FeatureFlags.ClientMetrics && *c.MetricsSettings.EnableClientMetrics)
 		}
 
 		if *license.Features.Announcement {