[Accessibility] Updates to the action items prev and next buttons

[Jaylyn-Barbee]

fixes #4254 and #4233

PR Type

Bugfix

Describe the current behavior?

1. Buttons didn't have a name or label
2. Buttons didn't have audio feedback when clicked and using narrator

Describe the new behavior?

1. Buttons named
2. Buttons announce the page number when clicked in narrator.

PR Checklist

• Test: run npm run test and ensure that all tests pass
• Target main branch (or an appropriate release branch if appropriate for a bug fix)
• Ensure that your contribution follows standard accessibility guidelines. Use tools like https://webhint.io/ to validate your changes.

Additional Information

[microsoft-github-policy-service]

Thanks Jaylyn-Barbee for opening a Pull Request! The reviewers will test the PR and highlight if there is any conflict or changes required. If the PR is approved we will proceed to merge the pull request 🙌