Animated Text broken on iOS with new Flutter 3.10 (first version that uses Impeller on iOS by default)

edit: edited for new flutter 3.10.

**Describe the bug**
Animated Text broken when using the new Impeller renderer on iOS. Text only appears when animation is finished.

**To Reproduce**
Steps to reproduce the behavior:
1. Use the new Impeller renderer on iOS, by upgrading flutter to 3.10.
2. Use an ```ColorizeAnimatedText``` widget, for example.
3. Start your app on the simulator or on device
4. The animated text just shows up when animation is done.

**Expected behavior**
Animated text should work like it does with Skia, the old renderer.

**Flutter:**
- 3.10.0
- stable

**Additional context**
This could be an issue with impeller or with animated text. Impeller is now the default renderer on iOS and should be feature complete.

The issue is with the ColorizeAnimatedText widget under the Impeller renderer on iOS. Start by reviewing the widget's rendering code in the package, likely in lib/. Run the example app on an iOS simulator with Flutter 3.10+ to reproduce. Check for differences in how Impeller handles text or animation layers compared to Skia. 'Done' means the text animates correctly during the animation, not just at the end.

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