chore: Update aws-sdk-swift to 1.0.69

[sebaland]

Description

This PR includes the changes from #3942 to upgrade the aws-sdk-swift dependency to 1.0.69, which makes it possible to enable C++ interoperability mode (ref).

I'm also updating the Xcode and OS versions in our workflows, and skipping the usage of the build cache when the dependency cache is not found (this caused issues when updating dependencies)

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
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• 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 67.74%. Comparing base (b247482) to head (a8b61a9).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3948      +/-   ##
==========================================
- Coverage   67.76%   67.74%   -0.02%     
==========================================
  Files        1125     1125              
  Lines       52126    52126              
==========================================
- Hits        35325    35315      -10     
- Misses      16801    16811      +10     

Flag	Coverage Δ
API_plugin_unit_test	70.33% <ø> (ø)
AWSPluginsCore	70.36% <ø> (ø)
Amplify	47.89% <ø> (ø)
Analytics_plugin_unit_test	85.20% <ø> (ø)
Auth_plugin_unit_test	73.70% <ø> (+<0.01%)	⬆️
DataStore_plugin_unit_test	83.28% <ø> (-0.13%)	⬇️
Geo_plugin_unit_test	74.86% <ø> (ø)
Logging_plugin_unit_test	63.11% <ø> (ø)
Predictions_plugin_unit_test	35.42% <ø> (ø)
PushNotifications_plugin_unit_test	88.43% <ø> (ø)
Storage_plugin_unit_test	76.88% <ø> (ø)
unit_tests	67.74% <ø> (-0.02%)	⬇️

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