chore: Migrate deprecated Table to DataTable for CompletedLearnersTable

[zwidekalanga]

For all changes

• Ensure adequate tests are in place (or reviewed existing tests cover changes)

Only if submitting a visual change

• Ensure to attach screenshots
• Ensure to have UX team confirm screenshots

Screenshot

[codecov]

Codecov Report

Attention: Patch coverage is 80.70175% with 11 lines in your changes missing coverage. Please review.

Project coverage is 85.58%. Comparing base (152488a) to head (85d7d1c).
Report is 10 commits behind head on master.

Files with missing lines	Patch %	Lines
...components/Admin/data/hooks/useGenericTableData.js	75.75%	6 Missing and 2 partials ⚠️
...onents/Admin/data/hooks/useModuleActivityReport.js	78.57%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1303      +/-   ##
==========================================
- Coverage   85.60%   85.58%   -0.03%     
==========================================
  Files         566      568       +2     
  Lines       12467    12505      +38     
  Branches     2643     2608      -35     
==========================================
+ Hits        10672    10702      +30     
- Misses       1736     1743       +7     
- Partials       59       60       +1     

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