Remove deprecated Clipboard from the public API

[zoontek]

Summary:

Clipboard has been deprecated since it moved to @react-native-clipboard/clipboard. This PR removes it from the public API.

LogBox still uses it to copy logs, so I kept the internal module and the native modules. In dev, accessing Clipboard from react-native now throws an error that points to the community package.

Changelog:

[GENERAL] [BREAKING] - Remove deprecated Clipboard from the public API

Test Plan:

Commands I ran, and their results:

• yarn flow-check: 0 errors
• yarn build-types && yarn test-generated-typescript: passed
• yarn eslint on changed JS files: clean
• yarn test packages/eslint-plugin-react-native packages/react-native-babel-preset packages/react-native/Libraries/LogBox: 270 tests passed

[github-actions]

Warning

JavaScript API change detected

This PR commits an update to ReactNativeApi.d.ts, indicating a change to React Native's public JavaScript API.

• Please include a clear changelog message.
• This change will be subject to additional review.

This change was flagged as: BREAKING