60231 [flutter_tools] remove most use of global packages path (cla: yes, tool)

60241 [flutter_tools] fix tests that depend on correct cache existance (cla: yes, tool)

60263 [flutter_tools] last pass on general.shard unit tests (cla: yes, tool)

60317 [flutter_tools] surface null safety/experiment flags in attach (cla: yes, tool, waiting for tree to go green)

60381 Use ephemeral ports for iOS port forwarding (cla: yes, platform-ios, tool)

60395 [flutter tools] Revert desktop device name changes and print the category instead (cla: yes, tool, waiting for tree to go green)

60480 [flutter_tools] remove globals from base/android (cla: yes, tool)