[Fix] Profile about section completeness

[mnigh]

🤖 Resolves #10435.

👋 Introduction

This PR adds back fields that are needed in the DashboardHeadingUser fragment.

🦴 Bonus

704cb76: Removes a duplicate key (preferredLanguageForInterview) and adds in a missing key, preferredLanguageForExam, for the aboutSectionHasEmptyRequiredFields validator function.

🧪 Testing

Assist reviewers with steps they can take to test that the PR does what it says it does.

1. pnpm build
2. Create a user account
3. Navigate to /applicant
4. Observe incomplete status (red) on Personal and contact info item
5. Navigate to /applicant/personal-information#about-section
6. Fill in required fields and submit form
7. Navigate to /applicant
8. Observe complete status (green) on Personal and contact info item

📸 Screenshot

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 0% with 2 lines in your changes are missing coverage. Please review.

Project coverage is 38.62%. Comparing base (0c04b6e) to head (525784d).
Report is 1 commits behind head on main.

Files	Patch %	Lines
apps/web/src/validators/profile/about.ts	0.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff            @@
##               main   #10441   +/-   ##
=========================================
  Coverage     38.62%   38.62%           
  Complexity     1404     1404           
=========================================
  Files           994      994           
  Lines         30555    30553    -2     
  Branches       6562     6567    +5     
=========================================
  Hits          11801    11801           
+ Misses        18591    18587    -4     
- Partials        163      165    +2     

Flag	Coverage Δ
integrationtests	71.11% <ø> (ø)
unittests	31.58% <0.00%> (+<0.01%)	⬆️

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[esizer]

LGTM 👍