Log serverConnectionId instead of a pseudo connection string as Event…

…::getServer is deprecated

tests/UnifiedSpecTests/EventCollector.php

@@ -120,7 +120,7 @@ private function handleCommandMonitoringEvent($event): void
             'name' => self::getEventName($event),
             'observedAt' => microtime(true),
             'commandName' => $event->getCommandName(),
-            'connectionId' => self::getConnectionId($event),
+            'connectionId' => $event->getServerConnectionId(),
             'requestId' => $event->getRequestId(),
             'operationId' => $event->getOperationId(),
         ];
@@ -144,14 +144,6 @@ private function handleCommandMonitoringEvent($event): void
         $this->eventList[] = $log;
     }
 
-    /** @param CommandStartedEvent|CommandSucceededEvent|CommandFailedEvent $event */
-    private static function getConnectionId($event): string
-    {
-        $server = $event->getServer();
-
-        return sprintf('%s:%d', $server->getHost(), $server->getPort());
-    }
-
     private static function getEventName(object $event): string
     {
         static $eventNamesByClass = null;