76679 [flutter_tools] Fail fast when test dependencies are missing (cla: yes, tool, waiting for tree to go green)

76714 [flutter_tools] add unit test for error 32 in cache deletion (cla: yes, tool, waiting for tree to go green)

76721 [flutter_tools] replace vm_service extension methods with wrapper class (cla: yes, tool)

76724 [flutter_tools] fix comment in resident web runner (cla: yes, tool, waiting for tree to go green)

76725 [flutter_tools] remove process manager mocks from error_handling_io tests (cla: yes, tool, waiting for tree to go green)

76743 [flutter_tools] remove remaining extensions (cla: yes, tool, waiting for tree to go green)