Xcode Cloud Support (#234)

* Removed now unnecessary code from alpha builds
* Add nightly build configuration
* Update ruby dependencies
* Stop changing the app name for PRs and Nightly, the icon is sufficient
* Add ITSAppUsesNonExemptEncryption flag as per https://developer.apple.com/documentation/bundleresources/information_property_list/itsappusesnonexemptencryption and https://stackoverflow.com/questions/35841117/missing-compliance-status-in-testflight
* Updated app groups to reflect various environments: production, nightly and PR. Remove keychain access group as they should be inferred from the access groups

ci_scripts/ci_post_xcodebuild.sh

@@ -0,0 +1,15 @@
+#!/bin/sh
+
+source ci_common.sh
+
+setup_environment
+
+if [ "$CI_WORKFLOW" = "Release" ]; then
+    install_python_dependencies
+
+    bundle exec fastlane release_to_github
+    bundle exec fastlane prepare_next_release
+fi
+
+# Upload dsyms no matter the workflow
+bundle exec fastlane upload_dsyms_to_sentry dsym_path:"$CI_ARCHIVE_PATH/dSYMs"