ensure-native-runtime.mjs gained an import of windows-process-tree-gyp-rebuild.mjs,
but the fixture copied only the script itself, so every case in the suite died
with ERR_MODULE_NOT_FOUND before reaching its own assertions. copyScriptWithLocalModules
already walks a script's co-located imports for exactly this reason -- its own doc
comment names this failure -- so use it rather than listing files by hand.
The two Windows cases still fail here, on a missing node-pty ConPTY runtime that
also fails on main; this only stops a resolution error from standing in front of
whatever they were meant to catch.