59999 [flutter_tools] cleanup iOS test (tool, waiting for tree to go green)

60017 Fix typo in Linux CMake template (cla: yes, tool, waiting for tree to go green)

60018 [flutter_tools] switch linux desktop feature on (cla: yes, tool, waiting for tree to go green)

60041 Use assemble build system directly for build ios-framework (cla: yes, team, tool)

60060 [flutter_tools] fix root directory tests (cla: yes, tool)

60102 [flutter_tools] add null safety argument to unbreak frob (cla: yes, tool)

60111 Add null safety options to build ios-framework (a: existing-apps, a: null-safety, cla: yes, tool)