fix: bump swift sdk to 0.26.1

[atierian]

Issue #

• App rejected from store during upload #3324

Description

Bumps AWS SDK for Swift from 0.26.0 to 0.26.1.

0.26.1 pins aws-crt-swift 0.17.0, which puts the common_cryptor_spi.h behind an #ifdef directive to prevent the non-public symbols from being included in release builds.

This fix was confirmed through manual testing - uploading an app to App Store Connect that embeds a .framework, which wraps Amplify Swift + plugin targets.

In addition to confirming that the upload to App Store Connect succeeded, the non-public CCCryptorGCM... symbols were confirmed to not be included in release build artifacts.

Prior to Change / Before

> nm -m <archive-path>.xcarchive/Products/Applications/my_app.app/Frameworks/wrapper.framework/wrapper | grep CCCryptorGC
                 U _CCCryptorGCMAddAAD
                 U _CCCryptorGCMFinalize
                 U _CCCryptorGCMSetIV

> dwarfdump <archive-path>.xcarchive/dSYMs/wrapper.framework.dSYM | grep CCCryptorGCM -A 1
                DW_AT_name	("CCCryptorGCMSetIV")
                DW_AT_decl_file	("/.../checkouts/aws-crt-swift/aws-common-runtime/aws-c-cal/source/darwin/common_cryptor_spi.h")
--
                DW_AT_name	("CCCryptorGCMAddAAD")
                DW_AT_decl_file	("/.../checkouts/aws-crt-swift/aws-common-runtime/aws-c-cal/source/darwin/common_cryptor_spi.h")
--
                DW_AT_name	("CCCryptorGCMFinalize")
                DW_AT_decl_file	("/.../checkouts/aws-crt-swift/aws-common-runtime/aws-c-cal/source/darwin/common_cryptor_spi.h")

With Change / Now

> nm -m <archive-path>.xcarchive/Products/Applications/my_app.app/Frameworks/wrapper.framework/wrapper | grep CCCryptorGC
# no results

> dwarfdump <archive-path>.xcarchive/dSYMs/wrapper.framework.dSYM | grep CCCryptorGCM -A 1
# no results

Relevant Links

• AWS SDK for Swift 0.26.1 release
• aws-crt-swift 0.17.0 release
• Access to private Apple APIs prevents acceptance to App Store awslabs/aws-crt-swift#206
• Stop using private CommonCrypto APIs on iOS awslabs/aws-c-cal#170
• use AWS_APPSTORE_SAFE cflag to gate access to private APIs awslabs/aws-c-cal#171
• Fix App Store submissions. Remove code using non-public Apple APIs. awslabs/aws-crt-swift#207

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.