fix: show back pending status warning for email subscriptions

[sandrade-dcl]

What does this PR change?

Since we have recovered the double user's action for registering the email, we need to show back the yellow warning message right after we add/modify our email in "Account Settings" -> "Email Notifications".

How to test the changes?

1. Launch the explorer.
2. Go to Account Settings -> Email Notifications.
3. Add or modify your email.
4. Check that the warning message appears.
5. Go to your email inbox and confirm your email.
6. Go back to the explorer, go out of the Email Notifications and go back to it.
7. Check that the warning message doesn't appear because your email is already confirmed.

Our Code Review Standards

https://github.com/decentraland/unity-renderer/blob/master/docs/code-review-standards.md

Copilot summary

🤖[deprecated] Generated by Copilot at b567a17

Added logic to handle email verification and validation status in EmailNotificationsController.cs. This improves the user experience of managing email notifications in the My Account HUD.

[github-actions]

After the CI passes:

Web

This branch can be previewed at:

• https://play.decentraland.org/?explorer-branch=fix/show-back-pending-status-warning-for-email-subscriptions
• https://play.decentraland.zone/?explorer-branch=fix/show-back-pending-status-warning-for-email-subscriptions

Desktop:

If you have the launcher installed (download launcher) you can press open on the following link:

• Open custom protocol
• Open custom protocol with Developer Mode

SDK 6/7:

• Open SDK7 scenes playground
• Open SDK7 scenes in preview
• Open SDK6 scenes in preview

More

• Code coverage report: https://renderer-artifacts.decentraland.org/branch-coverage/fix/show-back-pending-status-warning-for-email-subscriptions
• Benchmark report: https://renderer-artifacts.decentraland.org/branch-benchmark/fix/show-back-pending-status-warning-for-email-subscriptions/index.html

[Ludmilafantaniella]

The yellow warning message correctly appears immediately after adding or modifying the email in 'Account Settings' -> 'Email Notifications'.
This fix has been verified on both Desktop and Browser.

Screen.Recording.2023-12-04.at.15.05.02.mov

[LucasLioyQA]

QA approved