66403 Revert “[flutter_tools] map file Uri to multi-root scheme if provided” (cla: yes, tool)

66405 [flutter_tools] reland: map file URIs to a multiroot scheme (cla: yes, tool)

66406 Check git commands in Flutter version check test (cla: yes, team, tool)

66417 [flutter_tools] flush UI thread tasks before finishing hot restart (cla: yes, tool)

66461 [flutter_tools] try deleting the web cache directory before copying new web sdk (cla: yes, tool, waiting for tree to go green)

66468 [flutter_tools] do not add events to closed sink in throttle transform (cla: yes, tool)