Users can enter state where account is `Confirmed` but email User Attribute is `Not Verified`

Potential bug based on issue referenced in https://github.com/aws-amplify/amplify-ui/issues/6295

> I'm commenting to clarify one thing because I do believe it could be a similar request.
>
> My issue was filed in V5 which could cause confusion given that a lot of the API and hub events changed since.
>
> I do ask for what they ask for here: https://github.com/aws-amplify/amplify-js/issues/11270#issuecomment-1516828570
>
> One thing @rajleechaudry hasn't clarified, is whether they set the autoSignIn flag to true when calling the `signUp` method. We do this and end up with accounts that are `Confirmed` and have the email User Attribute as `Not verified`. In that case, there is no way for us to trigger the email verification flow in the `Authenticator`.
>
> If we were not to set the autoSignIn flag when calling `signUp`, back in v5, the `Authenticator` will go into the confirm signup flow which on success will set the user as `Confirmed` and email User Attribute as `Verified`.
>
> Meaning, in the `Authenticator`, for unauthenticated users, there is no way to trigger the email User Attribute verification flow if their account is marked as `Confirmed`.

_Originally posted by @ysabri in [#6295](https://github.com/aws-amplify/amplify-ui/issues/6295#issuecomment-2608635041)_

Read the discussion in #6295 and the referenced amplify-js comment, then trace the Authenticator flow around signUp with autoSignIn enabled. Reproduce the state where the account is Confirmed but the email attribute is Not verified; done should include a reachable email-verification flow for unauthenticated users.

Written by the indexing model from the issue text.