82851 [flutter_tools] adjust some feature settings (tool, cla: yes, waiting for tree to go green)

82852 [flutter_releases] Flutter Dev 2.3.0-12.1.pre Framework Cherrypicks (tool, cla: yes)

82869 [flutter_tools] pin shelf version at 1.1.4 (tool, cla: yes, waiting for tree to go green)

82875 [flutter_tools] remove mocks from compile expression unit test (tool, cla: yes, waiting for tree to go green)

82882 Remove more mocks from error_handling_io_test (team, tool, cla: yes, waiting for tree to go green, a: null-safety)

82933 Double we typo fixed (tool, cla: yes, waiting for tree to go green)