[3.14] gh-132983: Simplify ``_zstd_exec()`` (GH-133775)#133786

AA-Turner merged 1 commit intopython:3.14python/cpython:3.14from

miss-islington:backport-bbe9c31-3.14miss-islington/cpython:backport-bbe9c31-3.14Copy head branch name to clipboard