Automatically inject debugger statements in tests in preparation for debug mode (#53205)

Summary:
Pull Request resolved: https://github.com/facebook/react-native/pull/53205

Changelog: [internal]

This injects a custom Babel transform for Fantom tests that automatically injects `debugger` statements in the generated code. This simplifies debugging by providing a default interruption point in the test setup for the test author to decide what to debug.

This has no effect unless the debugger is opened, which isn't happening yet.

Reviewed By: rshest

Differential Revision: D79996000

fbshipit-source-id: 6153587264d293a067e359edba4f64f41898c506