fix: improve error handling in cohorts

[diana-villalvazo-wgu]

Description

We still had some modals without danger variant and no close button in cohorts, so i create this PR to fix it, and fixed the tests related.

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 91.19%. Comparing base (f5919f0) to head (b376cfc).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #211      +/-   ##
==========================================
+ Coverage   91.02%   91.19%   +0.17%     
==========================================
  Files         148      148              
  Lines        2708     2715       +7     
  Branches      577      581       +4     
==========================================
+ Hits         2465     2476      +11     
+ Misses        237      233       -4     
  Partials        6        6              

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🎉 This PR is included in version 1.0.0-alpha.44 🎉

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[openedx-semantic-release-bot]

🎉 This PR is included in version 1.0.0 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

Your semantic-release bot 📦🚀