Add FXIOS-14250 TestFlight WhatToTest file for release automation

[hneiva]

📜 Tickets

Jira ticket
Github issue

💡 Description

Adds the WhatToTest file so release automation can add builds to TestFlight groups automagically.

🎥 Demos

no

📝 Checklist

• I filled in the ticket numbers and a description of my work
• I updated the PR name to follow our PR naming guidelines
• I ensured unit tests pass and wrote tests for new code
• If working on UI, I checked and implemented accessibility (Dynamic Text and VoiceOver)
• If adding telemetry, I read the data stewardship requirements and will request a data review
• If adding or modifying strings, I read the guidelines and will request a string review from l10n
• If needed, I updated documentation and added comments to complex code

[mobiletest-ci-bot]

🧹 Tidy commit

Just 1 file(s) touched. Thanks for keeping it clean and review-friendly!

🙌 Friday high-five

Thanks for pushing us across the finish line this week! 🙌

✅ Per-file coverage

All changed files meet the threshold of 35.0%.

Generated by 🚫 Danger Swift against 636c7a4

[github-actions]

This PR has been automatically marked as stale. Please leave any comment to keep this PR opened. It will be closed automatically if no further update occurs in the next 7 days. Thank you for your contributions!