feat: refactor groups alert logic to use credits_available api

[katrinan029]

For all changes

Updates the fetch logic for a new groups alert to use the credits_available api
https://2u-internal.atlassian.net/browse/ENT-9010

• Ensure adequate tests are in place (or reviewed existing tests cover changes)
• Ensure English strings are marked for translation. See documentation for more details.

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 85.99%. Comparing base (b533813) to head (0dc6f35).
Report is 4 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1094      +/-   ##
==========================================
- Coverage   86.00%   85.99%   -0.01%     
==========================================
  Files         381      378       -3     
  Lines        7795     7754      -41     
  Branches     1867     1897      +30     
==========================================
- Hits         6704     6668      -36     
+ Misses       1037     1032       -5     
  Partials       54       54              

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[adamstankiewicz]

This is looking great! Thanks for tackling it. Tested it locally and seems to function as expected :) I left a few nits and minor suggestions for your consideration.