feat: add bulk approve for learner credit requests

[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

Screenshots

[codecov]

Codecov Report

❌ Patch coverage is 98.85057% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 87.16%. Comparing base (8dc30fa) to head (08c4458).
⚠️ Report is 3 commits behind head on master.

Files with missing lines	Patch %	Lines
...gement/requests-tab/BulkApproveBnrRequestModal.jsx	96.15%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1733      +/-   ##
==========================================
+ Coverage   87.12%   87.16%   +0.03%     
==========================================
  Files         781      786       +5     
  Lines       17886    17970      +84     
  Branches     3729     3737       +8     
==========================================
+ Hits        15583    15663      +80     
- Misses       2228     2232       +4     
  Partials       75       75              

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