Fix layout animations that use custom animations changing colours

[szydlovsky]

Summary

As stated in #5826, layout animation that had a custom animation inside (specifically, withDelay that launched a withTiming that animates background colour change) just wasn't properly working. Turned out, that we have to pass values between colour animations as unprocessed rgba's rather than processed numbers.

This PR fixes it and, of course, the issue as well.

Test plan

You can try the following code (it is a cleaned version of snack given in the mentioned issue):

Code

import { Text, SafeAreaView, StyleSheet, View } from 'react-native';
import {
  Gesture,
  GestureDetector,
  GestureHandlerRootView,
} from 'react-native-gesture-handler';
import Animated, {
  runOnJS,
  withDelay,
  withTiming,
} from 'react-native-reanimated';
import React, { useState } from 'react';

export default function EmptyExample() {
  const [myArray, setArray] = useState([1, 2, 3, 4, 5]);

  const customAnim = () => {
    'worklet';
    const animations = {
      backgroundColor: withDelay(
        500,
        withTiming('rgba(179, 6, 6, 1)', { duration: 500 })
      ),
    };
    const initialValues = { backgroundColor: 'rgba(16, 128, 26, 1)' };
    return { initialValues, animations };
  };

  const handleAddElement = Gesture.Tap().onStart(() => {
    runOnJS(setArray)([...myArray, Math.random().toString()]);
  });
  return (
    <SafeAreaView style={styles.container}>
      <GestureHandlerRootView>
        <GestureDetector gesture={handleAddElement}>
          <View>
            <Text>Add Element</Text>
          </View>
        </GestureDetector>
        {myArray.map((item) => {
          return (
            <Animated.View key={item.toString()} entering={customAnim}>
              <Text>{item}</Text>
            </Animated.View>
          );
        })}
      </GestureHandlerRootView>
    </SafeAreaView>
  );
}

const styles = StyleSheet.create({
  container: {
    flex: 1,
    justifyContent: 'center',
    backgroundColor: '#ecf0f1',
    padding: 8,
  },
});

[tomekzaw]

Looks good, let's add runtime tests for that (cc @Latropos)

[Latropos]

LGTM!
You may consider including transparency (or hex colors, or nnamed colors) in your tests as well

[Latropos]

When adding snaphot to CSpell.json please try to keep these words in alphabetical order