80946 [devicelab] remove globals and dependency tracking from technical debt (team, cla: yes)

80958 Revert “[devicelab] remove globals and dependency tracking from technical debt” (team, cla: yes)

80959 Revert “[flutter_tools] pin transitive deps during –transitive-closure” (team, tool, cla: yes)

80974 Adding win devicelab bot results to dashboard. (team, cla: yes, waiting for tree to go green)

80989 Roll packages (team, tool, cla: yes)

81002 Migrate analyze_size to null safety (team, tool, cla: yes, a: null-safety)

81004 Remove “unnecessary” imports in dev/ (team, cla: yes, waiting for tree to go green)