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.

Change forwarding command to pass through all args, even -h - this allows flutter to support all of the pub flags without needing to declare them.

This reverts commit 4bd89b39.

This reverts commit 422a97d1 due to https://github.com/flutter/flutter/issues/69863