fix: disable code signing for Pods targets in CI

Author: geoffroy-luc

zyncro/ios/Podfile

@@ -39,5 +39,8 @@ end
 post_install do |installer|
   installer.pods_project.targets.each do |target|
     flutter_additional_ios_build_settings(target)
+    target.build_configurations.each do |config|
+      config.build_settings['CODE_SIGNING_ALLOWED'] = 'NO'
+    end
   end
 end