fix(client/ios): filter AppKitIntegration framework to maccatalyst

[sbruens]

This platform filter was accidentally removed in #2090 and causing asset validation issues for the iOS app:

Asset validation failed
This bundle is invalid. Applications built for more than one architecture require an iOS Deployment Target of 3.0 or later. (ID: ec5bf398-a85e-4069-a03f-9b7cb51b40c4)

Asset validation failed
Unsupported Architectures. The executable for Outline.app/Frameworks/AppKitIntegration.framework contains unsupported architectures '[x86_64]'. (ID: 72745965-6014-4983-9631-028f7a57c917)

Asset validation failed
Invalid bundle structure. The “Outline.app/Frameworks/AppKitIntegration.framework/Versions/A/AppKitIntegration” binary file is not permitted. Your app cannot contain standalone executables or libraries, other than a valid CFBundleExecutable of supported bundles. For details, visit: https://developer.apple.com/documentation/bundleresources/placing_content_in_a_bundle (ID: a4bf6667-5817-46c6-b175-9d4dbc889d5f)

Asset validation failed
Missing Info.plist value. A value for the key 'MinimumOSVersion' in bundle Outline.app/Frameworks/AppKitIntegration.framework is required. (ID: 446cd137-ed5d-4739-8b15-cd2148017874)

Asset validation failed
Invalid Segment Alignment. The app binary at 'Outline.app/Frameworks/AppKitIntegration.framework/AppKitIntegration' does not have proper segment alignment. Try rebuilding the app with the latest Xcode version. (ID: 25fe97fe-0caa-4818-b300-ac123462192c)

Asset validation failed
Invalid Segment Alignment. The app binary at 'Outline.app/Frameworks/AppKitIntegration.framework/Versions/A/AppKitIntegration' does not have proper segment alignment. Try rebuilding the app with the latest Xcode version. (ID: b3588581-58e7-4822-8b55-e380dfa2bc78)

Asset validation failed
The binary is invalid. The encryption info in the LC_ENCRYPTION_INFO load command is either missing or invalid, or the binary is already encrypted. This binary does not seem to have been built with Apple's linker. (ID: b4c38d6e-aaaa-45f4-9882-0a09c501a1ad)

Asset validation failed
Invalid Bundle. The bundle Outline.app/Frameworks/AppKitIntegration.framework does not support the minimum OS Version specified in the Info.plist. (ID: 2c802eb5-9e91-4a4e-87c6-c1e114473182)

[jyyi1]

LGTM. You can try the release script on this branch.