test: skip test failing when run under root

Signed-off-by: LiviaMedeiros <livia@cirno.name>
PR-URL: https://github.com/nodejs/node/pull/66666
Reviewed-By: Xuguang Mei <meixuguang@gmail.com>
Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>

test/parallel/test-fs-rmSync-special-char-additional-error.js

@@ -6,6 +6,9 @@ const fs = require('node:fs');
 const path = require('node:path');
 const { execSync } = require('child_process');
 
+if (!common.isWindows && process.getuid() === 0)
+  common.skip('running this test as root would ignore directory permissions');
+
 tmpdir.refresh(); // Prepare a clean temporary directory
 
 function countOccurrences(haystack, needle) {