33554 Remove obsolete TODOs (cla: yes, team)

33595 Add DiagnosticableMixin (cla: yes)

33596 Un-mark uncaught_image_error_linux as flaky (cla: yes)

33602 Remove assert from Image._handleImageFrame() (cla: yes)

33608 Restructure macOS project files (cla: yes, tool)

33611 Use Dart’s new direct ELF generator to package AOT blobs as shared libraries in Android APKs (cla: yes, tool)

33620 Document that offsets are returned in logical pixels (cla: yes, d: api docs, framework)

33624 CupertinoTabScaffold crash fix (cla: yes, f: cupertino)