feat: implemented restricted country implementation

[sundasnoreen12]

Description

We are introducing a feature that allows platform administrators to restrict users from selecting one or more countries in Authn MFE.

How Has This Been Tested?

We retrieved the list of restricted countries by calling the following API:

👉 https://courses.edx.org/user_api/v1/account/registration/

At the same time, we obtained the translated country names using the i18n-iso-countries package.

Once both datasets were available, we filtered out the restricted countries from the translated list and displayed the updated country list in the UI.

Merge Checklist

• If your update includes visual changes, have they been reviewed by a designer? Send them a link to the Sandbox, if applicable.
• Is there adequate test coverage for your changes?

Post-merge Checklist

• Deploy the changes to prod after verifying on stage or ask @openedx/2u-infinity to do it.
• 🎉 🙌 Celebrate! Thanks for your contribution.

[codecov]

Codecov Report

Attention: Patch coverage is 50.00000% with 11 lines in your changes missing coverage. Please review.

Project coverage is 86.07%. Comparing base (1477ed3) to head (1ab1558).
Report is 59 commits behind head on 2u-main.

Files with missing lines	Patch %	Lines
src/common-components/data/service.js	0.00%	10 Missing and 1 partial ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           2u-main    #1425      +/-   ##
===========================================
- Coverage    86.57%   86.07%   -0.50%     
===========================================
  Files          134      139       +5     
  Lines         2413     2471      +58     
  Branches       669      678       +9     
===========================================
+ Hits          2089     2127      +38     
- Misses         311      328      +17     
- Partials        13       16       +3     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[awais-ansari]

Please improve test coverage.