chore: Update cicd.yml file on flame_3d to match main, rollback color changes (#3378)

Update cicd.yml file on flame_3d to match main.

Since we finally updated main, we should require no difference
whatsoever on this file anymore.

This will require downgrading all the color changes, which is fine. This
should never have been a part of flame_3d to begin with.

Files were "untouched" by checking out the exact version as they are in
main right now (will need to rebase flame_3d to main later). I had to
add a couple more files because the files on main had dependencies on
changes that are not yet rebased on flame_3d. These extra diffs should
disappear when I do the final rebase.

examples/lib/stories/collision_detection/raycast_example.dart

@@ -17,7 +17,7 @@ around trying not to hit them.
   Ray2? ray;
   Ray2? reflection;
   Vector2 origin = Vector2(250, 100);
-  Paint paint = Paint()..color = Colors.amber.withValues(alpha: 0.6);
+  Paint paint = Paint()..color = Colors.amber.withOpacity(0.6);
   final speed = 100;
   final inertia = 3.0;
   final safetyDistance = 50;