fastlane's deliver action invokes Apple's iTMSTransporter / altool to
push the IPA to App Store Connect, and those tools only ship inside
Xcode. On a generic ruby:3.3 Linux container the upload step crashed
with 'No such file or directory @ dir_chdir0' from
JavaTransporterExecutor#execute, because Helper.itms_path resolved
to a missing Xcode path.
Move publish-app-store onto the same self-hosted Mac runner as
build-ipa (tags: [macos]), drop the now-unnecessary 'gem install
fastlane' (the Mac has it on PATH via ~/.bash_profile), and unset
APP_STORE_CONNECT_API_KEY_PATH to mirror build-ipa's defense against
fastlane's env-var collision (match expects a JSON descriptor there;
we pass the API key inline via the Fastfile).
Update AGENTS.md and the release / ci-cd-publishing / mac-runner
skills, which all incorrectly described publish-app-store as a
Linux-only API call.
Regression-of: b8773c47
Alex Gleason
f5bb8afaec