[Advanced Settings][Serverless] Extend reload page toast lifetime (el…

…astic#173563)

Addresses elastic#172922

## Summary

This PR extends the "Reload page" toast lifetime to 15s (it was 5s
before). This change was added to the original (stateful) Advanced
settings plugin with elastic#169899 and
we need to also add it to the new Settings packages before we integrate
them into stateful Kibana.

Co-authored-by: Kibana Machine <[email protected]>

packages/kbn-management/settings/components/form/reload_page_toast.tsx

@@ -45,5 +45,6 @@ export const reloadPageToast = (theme: ThemeServiceStart, i18nStart: I18nStart):
       { i18n: i18nStart, theme }
     ),
     color: 'success',
+    toastLifeTimeMs: 15000,
   };
 };