[优化]用实例化的方式把settings导入etcd

management-panel/config/etcd-config.php

@@ -0,0 +1,10 @@
+<?php
+
+return [
+    'settings' => [
+        \App\Settings\DataSourceSettings::class,
+        \App\Settings\ExporterSettings::class,
+        \App\Settings\TimeSettings::class,
+        \App\Settings\RemoteWriteSettings::class,
+    ]
+];