54884 [flutter_tools] Provide global options with subcommand help text (cla: yes, tool)

54887 Specify the devicelab task simulator runtime to support <Xcode 11.4 (cla: yes, team)

54891 Mark ios_app_with_watch_companion as flaky (cla: yes, team, team: infra)

54893 Fix the stage of ios_app_with_watch_companion (cla: yes, team)

54894 Update dartdoc to 0.30.4. (cla: yes, team, waiting for tree to go green)

54899 Pass in runtime to ios_app_with_watch_companion simctl create (cla: yes, team, team: infra)