test(data): Gen2 data customize auth doc example testing

[lawmicha]

Issue #

Description

This PR builds ontop of #3699 and keeps adding more schemas to test the docs. The docs PR is at aws-amplify/docs#7604

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 67.59%. Comparing base (c130105) to head (93e9e43).
Report is 3 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3705      +/-   ##
==========================================
- Coverage   68.51%   67.59%   -0.92%     
==========================================
  Files        1089     1016      -73     
  Lines       37651    34253    -3398     
==========================================
- Hits        25795    23152    -2643     
+ Misses      11856    11101     -755     

Flag	Coverage Δ
API_plugin_unit_test	68.97% <ø> (ø)
AWSPluginsCore	65.81% <ø> (ø)
Amplify	48.17% <ø> (+0.01%)	⬆️
Analytics_plugin_unit_test	84.52% <ø> (ø)
Auth_plugin_unit_test	79.34% <ø> (+0.01%)	⬆️
DataStore_plugin_unit_test	81.39% <ø> (-0.57%)	⬇️
Geo_plugin_unit_test	72.00% <ø> (ø)
Logging_plugin_unit_test	62.87% <ø> (ø)
Predictions_plugin_unit_test	37.32% <ø> (ø)
PushNotifications_plugin_unit_test	86.21% <ø> (ø)
Storage_plugin_unit_test	?
unit_tests	67.59% <ø> (-0.92%)	⬇️

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