92901 Exit on deprecated v1 embedding when trying to run or build (team, tool, a: accessibility, cla: yes, waiting for tree to go green, integration_test)

92924 Update packages (team, tool, cla: yes, waiting for tree to go green)

92946 Add Help menu to macOS create template (team, tool, cla: yes, waiting for tree to go green, integration_test)

92948 Remove globals_null_migrated.dart, move into globals.dart (tool, cla: yes, waiting for tree to go green)

92950 Migrate channel, clean and a few other commands to null safety (tool, cla: yes, waiting for tree to go green)

92952 Migrate doctor, format, and a few other commands to null safety (tool, cla: yes, waiting for tree to go green, a: null-safety, tech-debt)