77419 fix Autovalidate enum references in fix data (cla: yes, cp: 2.0, cp: 2.0 completed, f: cupertino, f: material design, framework, waiting for tree to go green)

77427 Declare NavigationRailDestination.label as non-nullable (cla: yes, f: material design, framework, waiting for tree to go green)

77434 Enable unnecessary_await_in_return lint (a: tests, cla: yes, f: material design, framework, team, tool, waiting for tree to go green)

77454 Fix a legacy TODO (a: tests, cla: yes, framework, team, waiting for tree to go green)

77463 [docs] added flutter-fix and dart-fix public links (cla: yes, framework, waiting for tree to go green)