Feat: dSYM debug info for iOS & macOS builds by @vaind in https://github.com/flutter/flutter/pull/101586

Null safety migration of packages/flutter_tools/test/commands.shard/permeable by @liamappelbe in https://github.com/flutter/flutter/pull/110710

Null safety migration of packages/flutter_tools/test/commands.shard/hermetic, part 3/3 by @liamappelbe in https://github.com/flutter/flutter/pull/110709

Null safety migration of packages/flutter_tools/test/commands.shard/hermetic, part 2/3 by @liamappelbe in https://github.com/flutter/flutter/pull/110708