feat: fixes invalid members being added to groups

[katrinan029]

Description

Fixes bug that adds invalid org members to a group in the create group modal.

https://2u-internal.atlassian.net/browse/ENT-9858

Screen.Recording.2025-01-06.at.2.02.27.PM.mov

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

All modified and coverable lines are covered by tests ✅

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Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff            @@
##             master    #1373   +/-   ##
=========================================
  Coverage          ?   85.80%           
=========================================
  Files             ?      610           
  Lines             ?    13430           
  Branches          ?     2785           
=========================================
  Hits              ?    11523           
  Misses            ?     1837           
  Partials          ?       70           

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