Updated fedauth error tests

[tkyc]

Internal pipelines are failing because the error message returned from failed AAD password auth has changed. Updated tests.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 50.96%. Comparing base (b27b0c1) to head (05d210d).
Report is 1 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #2538      +/-   ##
============================================
- Coverage     51.01%   50.96%   -0.06%     
+ Complexity     3912     3898      -14     
============================================
  Files           147      147              
  Lines         33371    33371              
  Branches       5593     5593              
============================================
- Hits          17024    17007      -17     
+ Misses        13962    13957       -5     
- Partials       2385     2407      +22     

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