83282 [flutter_tools] remove getLocalEngineArtifacts from integration tests that cant use it (tool, cla: yes, waiting for tree to go green)

83285 Disable clang format in the plugin registrants (tool, cla: yes, waiting for tree to go green)

83293 [flutter_tools] throw a tool exit if pub cannot be run (tool, cla: yes, waiting for tree to go green)

83297 Skip flaky debugger_stepping_web_test (tool, cla: yes, team: flakes, waiting for tree to go green)

83310 Migrate localizations and generate_synthetic_packages to null safety (team, tool, cla: yes, waiting for tree to go green, a: null-safety)