62534 [flutter_tools] deflake integration tests by running single isolate (cla: yes, team, waiting for tree to go green)

62539 migrate macrobenchmark/multi_widget_construction test to e2e (cla: yes, team, waiting for tree to go green)

62544 Reland “Add Crane test to the new Gallery app (#62162)” (cla: yes, team, waiting for tree to go green)

62553 After cleaning up 812 warnings: Make warnings fatal in dartdocs (cla: yes, framework, team, waiting for tree to go green)

62590 [flutter_tools] add snapshot analysis dependency (cla: yes, team)

62614 Make dartdoc warnings fatal for flutter_test (cla: yes, framework, team, waiting for tree to go green)