56605 Remove direct uses of LocalPlatform (cla: yes, team, tool)

56618 Update Linux template for headless mode (cla: yes, tool, waiting for tree to go green)

56620 Remove Runner target check, prefer schemes (cla: yes, t: xcode, team, tool, waiting for tree to go green)

56630 [flutter tools] Fix an assert in IOSSimulator.getLogReader (cla: yes, tool)

56633 [flutter_tools] enable tree-shake-icons by default for non-web targets (cla: yes, tool)

56634 [flutter_tools] rename getSkSL file output ext to .sksl.json (cla: yes, tool)

56685 typo fix on the FLUTTER_STORAGE_BASE_URL usage (cla: yes, tool, waiting for tree to go green)