[Admin][Users] Add new admin store credits invalidate flow

[MadelineCollier]

Summary

This PR is for issue: #5824

This is the second to last piece of the refactored store credits flow. Just missing the flow to create new store credits in the new admin. Again, no designs so I did my best.

Screenshots

Screen.Recording.2024-12-12.at.12.59.40.PM.mov

Checklist

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 89.57%. Comparing base (596adae) to head (c734f99).
Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #6034      +/-   ##
==========================================
- Coverage   92.47%   89.57%   -2.91%     
==========================================
  Files         383      790     +407     
  Lines        8333    18224    +9891     
==========================================
+ Hits         7706    16324    +8618     
- Misses        627     1900    +1273     

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