fix: adjust clipboard mock (#34672)

Summary:
Currently, Clipboard's methods (setString, getString) can't be asserted when writing tests as the mock targeted `Libraries/BatchedBridge/NativeModules` instead of `Libraries/Components/Clipboard/Clipboard` that's used on react-native [entry point](https://github.com/facebook/react-native/blob/main/index.js#L270) so it won't be considered as `mock function`.

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[General] [Changed] - Update `Clipboard` mock path

Pull Request resolved: #34672

Test Plan:
```js
// App-test.js

import { Clipboard } from 'react-native';
import React from 'react';

it('renders correctly', () => {
  Clipboard.setString('string');
  expect(Clipboard.setString).toBeCalled();
});
```

### before

<img width="473" alt="Screen Shot 2022-09-13 at 16 24 30" src="https://user-images.githubusercontent.com/5382429/189864957-6b926478-6781-4291-a1eb-4493779de1a2.png" />

### after

<img width="598" alt="Screen Shot 2022-09-13 at 16 26 34" src="https://user-images.githubusercontent.com/5382429/189865131-e7c39f97-1cc1-4eb9-b4c0-d9ddf7a05c9c.png" />

Reviewed By: yungsters

Differential Revision: D39575916

Pulled By: cortinico

fbshipit-source-id: 34a3f93986a18d349ac033bb13a10ed77689935c

jest/setup.js

@@ -135,6 +135,10 @@ jest
       getRecommendedTimeoutMillis: jest.fn(),
     },
   }))
+  .mock('../Libraries/Components/Clipboard/Clipboard', () => ({
+    getString: jest.fn(() => ''),
+    setString: jest.fn(),
+  }))
   .mock('../Libraries/Components/RefreshControl/RefreshControl', () =>
     jest.requireActual(
       '../Libraries/Components/RefreshControl/__mocks__/RefreshControlMock',
@@ -201,10 +205,6 @@ jest
         process.nextTick(() => callback(null, [])),
       ),
     },
-    Clipboard: {
-      getString: jest.fn(() => ''),
-      setString: jest.fn(),
-    },
     DeviceInfo: {
       getConstants() {
         return {