Display qualifications granted to a worker in TaskReview app

[meta-paul]

When granting qualification to a worker in the TaskReview app, the reviewer will be able to see already granted qualifications.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 50.00000% with 15 lines in your changes are missing coverage. Please review.

Project coverage is 60.35%. Comparing base (cd04708) to head (a4b4a98).

Files	Patch %	Lines
...er/api/views/worker_granted_qualifications_view.py	39.13%	14 Missing ⚠️
...r/api/views/unit_data_static_by_field_name_view.py	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1127      +/-   ##
==========================================
+ Coverage   60.31%   60.35%   +0.04%     
==========================================
  Files         209      210       +1     
  Lines       14773    14798      +25     
==========================================
+ Hits         8910     8932      +22     
- Misses       5863     5866       +3     

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