feat: Add global domain auth methods

[zachaysan]

Thanks for submitting a PR! Please check the boxes below:

• I have run pre-commit to check linting
• I have added information to docs/ if required so people know about the feature!
• I have filled in the "Changes" section below?
• I have filled in the "How did you test this code" section below?
• I have used a Conventional Commit title for this Pull Request

Changes

Adds the ability to set settings that will control the ability to globally block auth methods for the Flagsmith auth controller code.

How did you test this code?

N/A - testing will be done in the auth controller code.

[vercel]

The latest updates on your projects. Learn more about Vercel for Git ↗︎

Name	Status	Preview	Comments	Updated (UTC)
docs	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	May 14, 2024 6:58pm
flagsmith-frontend-preview	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	May 14, 2024 6:58pm
flagsmith-frontend-staging	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	May 14, 2024 6:58pm

[github-actions]

Uffizzi Preview deployment-51715 was deleted.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 95.99%. Comparing base (97df705) to head (7669371).
Report is 4 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #3949   +/-   ##
=======================================
  Coverage   95.99%   95.99%           
=======================================
  Files        1135     1135           
  Lines       36204    36205    +1     
=======================================
+ Hits        34754    34755    +1     
  Misses       1450     1450           

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