tools: do not lint GYP JS files

They are not maintained in this repository.

Signed-off-by: Antoine du Hamel <duhamelantoine1995@gmail.com>
PR-URL: https://github.com/nodejs/node/pull/66988
Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>

eslint.config.mjs

@@ -57,6 +57,7 @@ export default [
     'lib/punycode.js',
     'test/.tmp.*/**',
     'test/addons/??_*',
+    'tools/gyp/**',
 
     // We want to lint only a few specific fixtures folders
     'test/fixtures/*',