[code-reflection] RFR: Move ANF code to test code [v2]

[Maurizio Cimadamore]

On Tue, 17 Jun 2025 20:33:22 GMT, Paul Sandoz <psandoz at openjdk.org> wrote:

>> Move ANF dialect and transformer to test code.
>
> Paul Sandoz has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Update module info

Marked as reviewed by mcimadamore (Reviewer).

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PR Review: https://git.openjdk.org/babylon/pull/444#pullrequestreview-2938343803