Allow overriding the architecture to run xcodebuild under

[milch]

Checklist

• I've run bundle exec rspec from the root directory to see all new and existing tests pass
• I've followed the fastlane code style and run bundle exec rubocop -a to ensure the code style is valid
• I've read the Contribution Guidelines
• I've updated the documentation if necessary. (N/A)

Motivation and Context

This allows users to set explicitly what architecture to run xcodebuild as. For example, fastlane might be running under Rosetta, but xcodebuild should be running natively, or fastlane might be running natively but xcodebuild should be running under Rosetta.

Description

With a simple test app:

fastlane run xcodebuild scheme:Test project:Test.xcodeproj xcodebuild_architecture:x86_64 destination:"platform=iOS Simulator,name=iPhone 11"
[✔] 🚀
[13:32:19]: ------------------------
[13:32:19]: --- Step: xcodebuild ---
[13:32:19]: ------------------------
[13:32:19]: For a more detailed xcodebuild log open /Users/wallman/Library/Logs/fastlane/xcbuild/2022-05-25/67935/xcodebuild.log
[13:32:19]: $ set -o pipefail && arch -x86_64 xcodebuild -scheme "Test" -project "Test.xcodeproj" -destination "platform=iOS Simulator,name=iPhone 11" | tee '/Users/wallman/Library/Logs/fastlane/xcbuild/2022-05-25/67935/xcodebuild.log' | xcpretty --color --simple
[13:32:21]: ▸ Build Succeeded
▸ Build Succeeded

Testing Steps

N/A

[lacostej]

looks good to me

[fastlane-bot]

Hey @milch 👋

Thank you for your contribution to fastlane and congrats on getting this pull request merged 🎉
The code change now lives in the master branch, however it wasn't released to RubyGems yet.
We usually ship about once a week, and your PR will be included in the next one.

Please let us know if this change requires an immediate release by adding a comment here 👍
We'll notify you once we shipped a new release with your changes 🚀

[fastlane-bot]

Congratulations! 🎉 This was released as part of fastlane 2.207.0 🚀