fix: missing scroll animation when switching between inputs in `KeyboardAwareScrollView` (#1484)

## 📜 Description

Fixed a problem with missing animation in `KeyboardAwareScrollView` when
switching between fields.

## 💡 Motivation and Context

The problem was because `removeGhostPadding` performed a synchronous
`scrollTo` (which overrides the effect of prior `scrollTo` call with
animation).

The fix is to skip the call when it's not necessary.

Additionally I tried to fix flakiness of
`KeyboardAwareScrollViewStickyView` tests by increasing an interval
between shared value update and call a function on a UI thread.

Closes
https://github.com/kirillzyusko/react-native-keyboard-controller/issues/1483

## 📢 Changelog

<!-- High level overview of important changes -->
<!-- For example: fixed status bar manipulation; added new types
declarations; -->
<!-- If your changes don't affect one of platform/language below - then
remove this platform/language -->

### JS

- wrap `runOnUI` in `requestAnimationFrame`;
- call `removeGhostPadding` only when keyboard is hidden (`e.height ===
0`)
- cover the regression with unit tests;

## 🤔 How Has This Been Tested?

Tested on iPhone 17 Pro (iOS 26.2) + e2e tests.

## 📸 Screenshots (if appropriate):

|Before|After|
|-------|-----|
|<video
src="https://github.com/user-attachments/assets/8016df4e-ae1d-4c86-8d6a-35dfbec5c7d0">|<video
src="https://github.com/user-attachments/assets/8ab020d4-2d87-4ada-bd66-387de7aef30f">|

## 📝 Checklist

- [x] CI successfully passed
- [x] I added new mocks and corresponding unit-tests if library API was
changed