feat: Show one card on learner credit screen

[zamanafzal]

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

[codecov]

Codecov Report

Patch coverage: 100.00% and project coverage change: -0.34% ⚠️

Comparison is base (4266584) 83.22% compared to head (1211922) 82.88%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1022      +/-   ##
==========================================
- Coverage   83.22%   82.88%   -0.34%     
==========================================
  Files         400      401       +1     
  Lines        8702     8730      +28     
  Branches     1799     1801       +2     
==========================================
- Hits         7242     7236       -6     
- Misses       1422     1455      +33     
- Partials       38       39       +1     

Files Changed	Coverage Δ
...earner-credit-management/MultipleBudgetsPicker.jsx	50.00% <ø> (ø)
...onents/learner-credit-management/BudgetCard-V2.jsx	100.00% <100.00%> (ø)
...credit-management/LearnerCreditAllocationTable.jsx	94.11% <100.00%> (-0.33%)	⬇️

... and 2 files with indirect coverage changes

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