Hide leading zeroes on int number in concatNode

[jakub-gonet]

Description

Fixes #677

When using concat node on Value which is an integer, Reanimated created a string with leading zeroes on Android and string without leading zeroes on IOS.

This PR fixes this and also fixes the localization of formatted numbers.

Reproduction Example

import React from 'react';
import { SafeAreaView, TextInput } from 'react-native';
import Animated from 'react-native-reanimated';
const { Value, concat, createAnimatedComponent } = Animated;

const price = new Value(44.5);
const AnimatedTextInput = createAnimatedComponent(TextInput);
const App = () => {
  return (
    <>
      <SafeAreaView>
        <AnimatedTextInput
          underlineColorAndroid="transparent"
          editable={false}
          {...{ text: concat('', price), style: { color: 'black' } }}
        />
      </SafeAreaView>
    </>
  );
};

export default App;

Pre-fix Screenshot:

Post-fix screenshots (localization with comma on decimals):

[jkadamczyk]

LGTM, but ask @kmagiera if your changes resolve his issues.