Alerting: add button to deactivate current alertmanager configuration (#36951)

* reset alert manager config button for admins

* "alert manager" -> "Alertmanager"

public/app/routes/routes.tsx

@@ -466,6 +466,13 @@ export function getAppRoutes(): RouteDescriptor[] {
           import(/* webpackChunkName: "AlertingRedirectToRule"*/ 'app/features/alerting/unified/RedirectToRuleViewer')
       ),
     },
+    {
+      path: '/alerting/admin',
+      roles: () => ['Admin'],
+      component: SafeDynamicImport(
+        () => import(/* webpackChunkName: "AlertingAdmin" */ 'app/features/alerting/unified/Admin')
+      ),
+    },
     {
       path: '/playlists',
       component: SafeDynamicImport(