63602 Ignore another dead_code hint for a weak-only null check. (cla: yes, framework, waiting for tree to go green)

63604 Update LinearGradient docs (cla: yes, framework, waiting for tree to go green)

63605 remove fuchsia_entrypoint_shim directory (cla: yes, team, tool, waiting for tree to go green)

63608 Revert: Update prepare_package.dart to use the process_runner package instead having duplicate code. #62710 (cla: yes, team)

63609 Clean up flutter_gallery__transition_perf (a: accessibility, cla: yes, team, waiting for tree to go green)

63610 [flutter_tools] support code size tooling on iOS, linux, windows, macOS, and Android on Windows (cla: yes, tool)