[misc] work around context assignments by i18n that leak across requests

Somewhere in i18next there is an assignment `ctx.lng=someLang` that
 leaks across requests that share the same `ctx` object for calls like
 `req.i18n.translate('locale', ctx)`.

This somewhere is likely here:
https://github.com/i18next/i18next/blob/6cc8917ed5b7a1a6e5db316644fe57474c150f18/src/i18next.translate.js#L338

GitOrigin-RevId: b05f62fa59a6ffa59724108fbcc68cc7a67cfd8f

services/web/app/src/Features/User/UserPagesController.js

@@ -215,7 +215,7 @@ const UserPagesController = {
         const data = providers[provider]
         data.description = req.i18n.translate(
           data.descriptionKey,
-          data.descriptionOptions
+          Object.assign({}, data.descriptionOptions)
         )
         result[provider] = data
       }