LG-14398: Add translations for "Email not yet selected"

[aduth]

🎫 Ticket

LG-14398

🛠 Summary of changes

Adds translations for the text "Email not yet selected".

This was implemented behind a feature flag in LG-13665 (#11196), but translations were not available for this particular string because it was not known to be needed until implementation had already started (see related Slack discussion), and the turnaround time for translations is long.

📜 Testing Plan

1. Prerequisite: Have a connection with a service provider (documentation)
2. Go to http://localhost:3000
3. Sign in (if not already)
4. From account dashboard, go to "Connected accounts"
5. (If you see a selected email here, you'll need to destroy the association. In rails console, run User.find_with_email('<insert email address>').identities.update_all(email_address_id: nil) and reload the page)
6. Note text "Email not yet selected"
7. Change page language
8. Note that the text for "Email not yet selected" is translated

👀 Screenshots

Language	Before	After
English
Spanish
French
Chinese