test: make tests pass on Windows with Unix EOL

It is possible on Windows to configure Git to checkout line-endings
"as-is", which for Node.js means Unix-style.
This change makes the tests that rely on line endings pass in that case.

PR-URL: https://github.com/nodejs/node/pull/40002


Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>