[ENG-11420] Add --what-to-test for ios submit

[khamilowicz]

Why

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How

How did you build this feature or fix this bug and why?

Test Plan

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[linear]

ENG-11420 Check if the `--changelog` flag of the `fastlane pilot` command used by EAS Submit sets the `What to test` (visible for internal testers) text or `What's new` text (visible in the App Store when a new version is published)

[github-actions]

❌ It looks like a changelog entry is missing for this PR. You have two options: you can add it manually, or you can use the changelog bot to do it for you.
🤖 To use the bot, simply comment on this PR with the command /changelog-entry [breaking-change|new-feature|bug-fix|chore] [message].
⏩ If this PR doesn't require a changelog entry, such as if it's an internal change that doesn't affect the user experience, you can add the "no changelog" label to the PR.

[ngima]

You can do it with store.config.json file in your project by setting the releaseNotes

Example

{
  "configVersion": 0,
  "apple": {
    "info": {
      "en-US": {
        "title": "App title",
        "subtitle": "Subtitle for your app",
        "description": "A longer description of what your app does",
        "keywords": ["keyword", "other-keyword"],
        "releaseNotes": "Bug fixes and improved stability",
        "promoText": "Short tagline for your app",
        "marketingUrl": "https://example.com/en",
        "supportUrl": "https://example.com/en/help",
        "privacyPolicyUrl": "https://example.com/en/privacy",
        "privacyChoicesUrl": "https://example.com/en/privacy/choices"
      }
    }
  }
}

Ref: https://docs.expo.dev/eas/metadata/schema/