feat: Add role prop to Text component

[gabrieldonadel]

Summary

As pointed out by @necolas on https://github.com/facebook/react-native/issues/34424#issuecomment-1261482517 we forgot we add the role prop mapping to the Text component. This PR adds a new role prop to Text, mapping the web role values to the already existing accessibilityRole prop and moves the roleToAccessibilityRoleMapping to a common file that can be imported by both the Text and View components as requested on https://github.com/facebook/react-native/issues/34424. This PR also updates the RNTester AcessebilityExample to include a test using this new prop.

Changelog

[General] [Added] - Add role prop to Text component

Test Plan

1. Open the RNTester app and navigate to the Accessibility Example page
2. Test the role prop through the Text with role = heading section

[analysis-bot]

Platform	Engine	Arch	Size (bytes)	Diff
android	hermes	arm64-v8a	7,777,909	+486
android	hermes	armeabi-v7a	7,178,967	+537
android	hermes	x86	8,090,829	+399
android	hermes	x86_64	8,062,605	+485
android	jsc	arm64-v8a	9,636,993	+112
android	jsc	armeabi-v7a	8,401,283	+115
android	jsc	x86	9,586,189	+131
android	jsc	x86_64	10,179,350	+124

Base commit: 5d8a712fd55a63b6d8778aad32af1583d5c5201a Branch: main

[analysis-bot]

Platform	Engine	Arch	Size (bytes)	Diff
ios	-	universal	n/a	--

Base commit: 5d8a712fd55a63b6d8778aad32af1583d5c5201a Branch: main

[gabrieldonadel]

@jacdebug would you mind rereviwing this PR?

[facebook-github-bot]

@jacdebug has imported this pull request. If you are a Meta employee, you can view this diff on Phabricator.

[react-native-bot]

This pull request was successfully merged by @gabrieldonadel in 20718e6b8ce4f5c3a8393067d5e8eb0da910751c.

^{When will my fix make it into a release? | Upcoming Releases}