feat: update action status handling to use keys instead of display value

[zwidekalanga]

• Change status checks from 'waiting_for_learner' to 'reminded'
• Change error reason checks from 'Failed: Cancellation' to 'failed_cancellation'
• Remove status transformation in useBnrSubsidyRequests hook
• Add formatErrorReason function in BnrRequestStatusCell for display formatting
• Update status display mapping in BudgetDetailApprovedRequestTable
• Update modal text from 'assigned' to 'pending'
• Update test data to use new status format

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

All modified and coverable lines are covered by tests ✅

Project coverage is 86.83%. Comparing base (da6362f) to head (063e3c1).

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1600      +/-   ##
==========================================
- Coverage   86.83%   86.83%   -0.01%     
==========================================
  Files         778      778              
  Lines       17597    17596       -1     
  Branches     3682     3593      -89     
==========================================
- Hits        15280    15279       -1     
- Misses       2242     2251       +9     
+ Partials       75       66       -9     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.

[omar-sarfraz]

Just wondering if we also need to update this constant. We're using it to determine whether the last action was reminded. If the recent backend changes now return recentAction with a lowercase key, we may need to update this constant accordingly.

We're currently using this constant here.

[jajjibhai008]

i think, there isn't any state for failed_system, failed_payment and failed_enrollment

[jajjibhai008]

Just mentioninig, do we need to make any changes RequestFailureModal.jsx as well?