78484 Clean up ignores that are not ignoring anything (a: accessibility, cla: yes, f: cupertino, f: material design, framework)

78489 [flutter_releases] Flutter Stable 2.0.3 Framework Cherrypicks (cla: yes, f: cupertino, f: material design, framework, team, tool)

78588 Automatically applying Scrollbars on desktop platforms with configurable ScrollBehaviors (a: desktop, cla: yes, customer: crowd, f: cupertino, f: material design, framework, platform-web, severe: API break, severe: new feature, waiting for tree to go green)

78663 Remove “unnecessary” imports in packages/flutter/lib. (cla: yes, f: cupertino, f: material design, framework, waiting for tree to go green)