chore: fix build warnings in amplify package

[thisisabhash]

Issue #

None

Description

This PR resolves build warning across amplify package.

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

❌ Patch coverage is 84.61538% with 4 lines in your changes missing coverage. Please review.
✅ Project coverage is 66.99%. Comparing base (a5c3faf) to head (e3e165a).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
Amplify/Core/Support/ChildTask.swift	83.33%	3 Missing ⚠️
...s/AWSAuthAttributeResendConfirmationCodeTask.swift	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4091      +/-   ##
==========================================
+ Coverage   66.89%   66.99%   +0.09%     
==========================================
  Files        1129     1129              
  Lines       42498    42500       +2     
==========================================
+ Hits        28429    28472      +43     
+ Misses      14069    14028      -41     

Flag	Coverage Δ
API_plugin_unit_test	68.38% <ø> (ø)
AWSPluginsCore	68.54% <100.00%> (ø)
Amplify	46.73% <84.21%> (+0.03%)	⬆️
Analytics_plugin_unit_test	84.84% <ø> (ø)
Auth_plugin_unit_test	72.63% <80.00%> (+0.21%)	⬆️
DataStore_plugin_unit_test	82.96% <ø> (+0.15%)	⬆️
Geo_plugin_unit_test	73.39% <ø> (ø)
Logging_plugin_unit_test	64.86% <ø> (ø)
Predictions_plugin_unit_test	34.24% <ø> (ø)
PushNotifications_plugin_unit_test	87.41% <ø> (ø)
Storage_plugin_unit_test	77.68% <100.00%> (ø)
unit_tests	66.99% <84.61%> (+0.09%)	⬆️

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.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.