Avoid redirections out of the 2FA page

What does this MR do and why?

Avoid redirections out of the 2FA page

When passkeys feature flag is enabled, all redirections should be within the 2FA. The reason is that the updated page indicates when the user has 2FA enabled. Before, that indicator was in the profile page.

References

Relates #581674 (comment 2918578551)

Closes #393750 (closed)

Screenshots or screen recordings

Before	After
Screen_Recording_2025-11-27_at_17.00.29	Screen_Recording_2025-12-02_at_11.55.43

How to set up and validate locally

No changes (user navigates to the account page)

1. Go to https://gdk.test:3443/-/profile/two_factor_auth
2. Enable the first 2FA method.
3. Click on Copy codes and Proceed buttons.
4. The user should land in https://gdk.test:3443/-/profile/account

User stays in the 2FA page

Now enables this flag, https://gdk.test:3443/rails/features/passkeys, and repeat the process above. The user should land in https://gdk.test:3443/-/profile/two_factor_auth (2FA page)

MR acceptance checklist

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