4426 [camera] Update [CameraOrientationTests testOrientationNotifications] unit test to work on Xcode 13 (cla: yes, waiting for tree to go green, p: camera, platform-ios)

4427 [ci] Always run all format steps (cla: yes, waiting for tree to go green)

4428 [flutter_plugin_tools] Fix pubspec-check on Windows (cla: yes)

4429 [ci] Update macOS Cirrus image to Xcode 13 (cla: yes, waiting for tree to go green)

4432 Bump compileSdkVersion to 31 (cla: yes, p: camera, platform-android)

4434 [in_app_purchase] Update to the latest pkg:json_serializable (cla: yes, p: in_app_purchase, platform-ios, platform-android)