chore: update roots from rust config to library config

[JoeWang1127]

Update roots from rust config to library config.

This PR needs to merge after merging googleapis/librarian#3821

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 95.01%. Comparing base (e49001e) to head (c554038).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4517      +/-   ##
==========================================
- Coverage   95.03%   95.01%   -0.02%     
==========================================
  Files         195      195              
  Lines        7429     7429              
==========================================
- Hits         7060     7059       -1     
- Misses        369      370       +1     

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