Merge and align global.d.ts and globals.d.ts files (#49516)

Summary:
Pull Request resolved: #49516

Merge global.d.ts and globals.d.ts into one file and align some definitions with implementations.

Changelog:
[General][Changed] - Improve TypeScript types for `global` objects

Reviewed By: huntie

Differential Revision: D69772463

Author: coado

packages/react-native/index.js

@@ -30,7 +30,6 @@ import typeof * as ReactNativePublicAPI from './index.js.flow';
 const warnOnce = require('./Libraries/Utilities/warnOnce').default;
 const invariant = require('invariant');
 
-/// <reference path="src/types/global.d.ts" />
 /// <reference path="src/types/globals.d.ts" />
 
 export type {HostComponent, HostInstance};