Fix failing UI tests after React Native upgrade in Gutenberg

[mokagio]

Implements a working albeit not elegant workaround to the issue of UI tests not being able to get a handle on the keyboard when attempting to insert text in the title and paragraph blocks in the Gutenberg editor built and integrated via XCFramework.

As you can see, CI is green here, while it's red in the base branch.

Based on #21134. In that PR, @jostnes made a few suggestions of approaches to try. I haven't had a chance to do so yet. If you trust I'll followup on the approaches, I'd rather merge with the tests green as is sooner rather than later. 😅

Regression Notes

1. Potential unintended areas of impact – N.A.
2. What I did to test those areas of impact (or what existing automated tests I relied on) – N.A.
3. What automated tests I added (or what prevented me from doing so) – N.A.

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PR submission checklist:

• I have completed the Regression Notes.
• I have considered adding unit tests for my changes. N.A.
• I have considered adding accessibility improvements for my changes. N.A.
• I have considered if this change warrants user-facing release notes and have added them to RELEASE-NOTES.txt if necessary. N.A.

UI changes testing checklist: Not a UI PR.

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[fluiddot]

Thanks @mokagio for the fix 🙇 ! I'm a bit hesitant about this workaround because typing should be a testable action. However, I tried the approaches shared by @jostnes here but none have worked when running the tests locally 🤔. Hence, I agree with going with this approach for now, especially for the sake of unblocking the React Native upgrade. We could review later on a better approach.

[fluiddot]

LGTM 🎊 !

• Tests are passing in CI ✅
• Running editor tests locally in Xcode succeed ✅