71935 Update dartdoc to 0.38.0 (cla: yes, team, waiting for tree to go green)

71937 Run plugin tests on try builders when flutter_tools changes (cla: yes, team, waiting for tree to go green)

71940 Remove duplicate code in Element.rebuild() and BuildOwner.buildScope() (cla: yes, framework)

71944 app bar leading back button should not change if the route is popped (cla: yes, f: material design, framework, waiting for tree to go green)

71950 [flutter_tool] Fix crash in update-packages (cla: yes, tool)

71951 Revert “Move embedding and linking macOS Flutter frameworks into the tool” (cla: yes, team, tool)

71953 Add macOS to lint plugins integration test (cla: yes, platform-mac, team)