feat: added enterKeyHint prop to textInput (#34482)

Summary:
This adds the `enterKeyHint` prop to the TextInput component as requested on https://github.com/facebook/react-native/issues/34424, mapping web [enterKeyHint types](https://developer.mozilla.org/en-US/docs/Web/HTML/Global_attributes/enterkeyhint) to equivalent [returnKeyType](https://reactnative.dev/docs/textinput#returnkeytype) values. This PR also updates RNTester TextInputExample in order to facilitate the manual QA.

## Open questions
 - What should be the `returnType` in the case of `previous` in iOS?

 - what should happen if `enterKeyHint` and `returnKeyType` props are passed together?

## Changelog
[General] [Added] - Add enterKeyHint prop to TextInput component

Pull Request resolved: https://github.com/facebook/react-native/pull/34482

Test Plan:
- Open the RNTester app and navigate to the TextInput page
 - Test the TextInput component through the `enterKeyHint modes section`

 <image src="https://user-images.githubusercontent.com/22423684/186191205-9c04732e-568c-4cce-9564-50a84d70dca3.png" height="600px" width="300px" />

Reviewed By: GijsWeterings

Differential Revision: D38957275

Pulled By: necolas

fbshipit-source-id: d75f2c2000df5d9606a005083b20bf3a23b48831