35516 more UI-as-code (cla: yes, team)

36864 Clean up bots output and remove timeouts (cla: yes, team, waiting for tree to go green)

36871 Audit use of defaultTargetPlatform (cla: yes, f: cupertino, f: material design, framework, waiting for tree to go green)

36998 Added properties in DropdownButtonFormField to match DropdownButton (cla: yes, f: material design, framework)

37024 Implement PageView using SliverLayoutBuilder, Deprecate RenderSliverFillViewport (cla: yes, f: gestures, f: scrolling, framework, severe: API break, waiting for tree to go green)

37268 run web tests in batches; enable foundation tests (cla: yes, ☸ platform-web)