fix(bb-sol): commit Debug.sol in forge-fmt-stable form on next

[AztecBot]

Summary

Companion to #23146 (merge-train/barretenberg), recreated against next.

barretenberg/sol/bootstrap.sh::build_sol runs forge fmt before forge build. PR #22659 (now in next via merge-train/fairies) trimmed unused imports from test/utils/Debug.sol; once trimmed, the multi-line import block was short enough that forge fmt collapses it to a single line. That rewrites the file mid-CI and trips ci3/cache_content_hash with ERROR: Noticed changes to rebuild patterns during CI run, disabling cache hits for every downstream *-tests target — as seen in http://ci.aztec-labs.com/1778494208886637.

This PR puts Debug.sol directly into the forge-fmt-stable form (single-line import). After rebase, this is the only diff against next.

Verification

cd barretenberg/sol
forge fmt --check    # clean
forge fmt            # no changes

Full analysis: https://gist.github.com/AztecBot/86bb7e59c1a9998f77dd1bc51dd9319d