adding scrollTo, and imperative handle exports for ScrollView (facebook#52204)

Summary:
Pull Request resolved: facebook#52204

Changelog:
[General][Added] - Expose `ScrollViewImperativeMethods` and `ScrollViewScrollToOptions` types to public API

Reviewed By: huntie

Differential Revision: D76920770

fbshipit-source-id: 01b0a2788f7b8a3bad0b57e24b04a7380233ac34

Author: Antonio Pires

packages/react-native/Libraries/__tests__/__snapshots__/public-api-test.js.snap

@@ -9057,6 +9057,8 @@ export type {
 export { default as RefreshControl } from \\"./Libraries/Components/RefreshControl/RefreshControl\\";
 export { default as SafeAreaView } from \\"./Libraries/Components/SafeAreaView/SafeAreaView\\";
 export type {
+  ScrollViewImperativeMethods,
+  ScrollViewScrollToOptions,
   ScrollResponderType,
   ScrollViewProps,
   ScrollViewPropsAndroid,

packages/react-native/index.js.flow

@@ -95,6 +95,8 @@ export {default as RefreshControl} from './Libraries/Components/RefreshControl/R
 export {default as SafeAreaView} from './Libraries/Components/SafeAreaView/SafeAreaView';
 
 export type {
+  ScrollViewImperativeMethods,
+  ScrollViewScrollToOptions,
   ScrollResponderType,
   ScrollViewProps,
   ScrollViewPropsAndroid,