fix(Auth): Throw error if hosted UI is not presented during sign out

[harsh62]

Issue #

#3766

Description

The PR aims to fix a problem where if SignOut failed with HostedUI, it proceeded to clear local cache and complete irrespective of the error.

Going forward, if an error happens during HostedUI, the signOut will fail with an error and give the developer.

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

Attention: Patch coverage is 38.88889% with 11 lines in your changes missing coverage. Please review.

Project coverage is 68.43%. Comparing base (6f65406) to head (931fa6a).
Report is 2 commits behind head on main.

Files	Patch %	Lines
...gin/StateMachine/CodeGen/Errors/SignOutError.swift	0.00%	9 Missing ⚠️
...hine/Resolvers/SignOut/SignOutState+Resolver.swift	0.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3769      +/-   ##
==========================================
- Coverage   68.47%   68.43%   -0.04%     
==========================================
  Files        1079     1079              
  Lines       37571    37578       +7     
==========================================
- Hits        25726    25717       -9     
- Misses      11845    11861      +16     

Flag	Coverage Δ
API_plugin_unit_test	68.83% <ø> (-0.04%)	⬇️
AWSPluginsCore	68.56% <ø> (ø)
Amplify	47.68% <ø> (+0.03%)	⬆️
Analytics_plugin_unit_test	84.52% <ø> (ø)
Auth_plugin_unit_test	79.33% <38.88%> (-0.15%)	⬇️
DataStore_plugin_unit_test	81.27% <ø> (-0.02%)	⬇️
Geo_plugin_unit_test	72.00% <ø> (ø)
Logging_plugin_unit_test	62.95% <ø> (ø)
Predictions_plugin_unit_test	37.32% <ø> (ø)
PushNotifications_plugin_unit_test	86.21% <ø> (ø)
Storage_plugin_unit_test	76.75% <ø> (ø)
unit_tests	68.43% <38.88%> (-0.04%)	⬇️

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