[web] Fix: `sendConfirmationEmail` promise (!!!) (#19629)

* Fix `sendConfirmationEmail` promise (!!!)

* Fix: No nested promises, and `sendConfirmationEmail`->`sendReconfirmationEmail`

* Add integration test on `/user/emails/send-reconfirmation`

* Update integration test: use the previously generated token

GitOrigin-RevId: f6386abeb06888351eec22fbcb1d3c614ff5c5c5

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

@@ -133,6 +133,7 @@ UserEmailsConfirmationHandler.promises = {
   sendConfirmationEmail: promisify(sendConfirmationEmail),
   confirmEmailFromToken,
   sendConfirmationCode,
+  sendReconfirmationEmail,
 }
 
 module.exports = UserEmailsConfirmationHandler