This will unblock the roll of the next Dart SDK

This reverts commit 7ba775a9.

Instead of loading the use-material-design asset data from a yaml file in the repo, leave it in dart code and simplify. Remove some of the globals, but not enough to update to testWithoutContext

This reverts commit dd279e41.

Add a --dart-entrypoint-args flag to flutter run to pass through Dart entrypoint arguments on Flutter Desktop (#69607)

Commit https://github.com/flutter/engine/pull/22348 appears to have
caused breakage https://github.com/flutter/flutter/issues/69983
[tool_crash] RPCError.

This reverts commit 9edfa122.

Allow modification of ListTile's horizontalTitleGap, minVerticalPadding, minLeadingWidth

This relands #68587

initialize the flutter root as early as possible. This allows all interfaces to be normally injected into commands, even if those objects might read from the flutter root.