69846 Remove add-to-app Xcode build phase input files (a: existing-apps, cla: yes, t: xcode, tool)

70518 Remove unused host_app_editable_cocoapods template files (a: existing-apps, cla: yes, tool)

70647 Allow any iOS app to be added to an existing host app (a: existing-apps, cla: yes, platform-ios, team, tool, waiting for tree to go green)

71100 Make simulator framework test check explicit (a: existing-apps, cla: yes, platform-ios, team, waiting for tree to go green)

71103 Move Flutter.podspec to add-to-app project template (a: existing-apps, cla: yes, platform-ios, tool)