chore(auth): add passwordless integration test

[harsh62]

Issue #

Description

General Checklist

• Added new tests to cover change, if needed
• Build succeeds with all target using Swift Package Manager
• All unit tests pass
• All integration tests pass
• Security oriented best practices and standards are followed (e.g. using input sanitization, principle of least privilege, etc)
• Documentation update for the change if required
• PR title conforms to conventional commit style
• New or updated tests include Given When Then inline code documentation and are named accordingly testThing_condition_expectation()
• If breaking change, documentation/changelog update with migration instructions

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 67.79%. Comparing base (ed263d7) to head (ead7222).
Report is 5 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #3930   +/-   ##
=======================================
  Coverage   67.79%   67.79%           
=======================================
  Files        1124     1124           
  Lines       51984    52001   +17     
=======================================
+ Hits        35242    35254   +12     
- Misses      16742    16747    +5     

Flag	Coverage Δ
API_plugin_unit_test	70.33% <ø> (ø)
AWSPluginsCore	70.36% <ø> (ø)
Amplify	47.90% <ø> (+0.01%)	⬆️
Analytics_plugin_unit_test	85.20% <ø> (ø)
Auth_plugin_unit_test	73.84% <ø> (+0.06%)	⬆️
DataStore_plugin_unit_test	83.30% <ø> (-0.14%)	⬇️
Geo_plugin_unit_test	74.86% <ø> (ø)
Logging_plugin_unit_test	63.11% <ø> (ø)
Predictions_plugin_unit_test	35.49% <ø> (ø)
PushNotifications_plugin_unit_test	88.43% <ø> (ø)
Storage_plugin_unit_test	76.88% <ø> (ø)
unit_tests	67.79% <ø> (+<0.01%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.