lib: use internal fileURLToPath

For internal usage, `internal/url` should be used.

Refs: nodejs#49553
PR-URL: nodejs#49558
Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com>
Reviewed-By: Raz Luvaton <rluvaton@gmail.com>
Reviewed-By: Chemi Atlow <chemi@atlow.co.il>
Reviewed-By: LiviaMedeiros <livia@cirno.name>
Reviewed-By: Yagiz Nizipli <yagiz@nizipli.com>
Reviewed-By: Minwoo Jung <nodecorelab@gmail.com>

lib/internal/test_runner/coverage.js

@@ -25,7 +25,7 @@ const {
 const { setupCoverageHooks } = require('internal/util');
 const { tmpdir } = require('os');
 const { join, resolve } = require('path');
-const { fileURLToPath } = require('url');
+const { fileURLToPath } = require('internal/url');
 const kCoverageFileRegex = /^coverage-(\d+)-(\d{13})-(\d+)\.json$/;
 const kIgnoreRegex = /\/\* node:coverage ignore next (?<count>\d+ )?\*\//;
 const kLineEndingRegex = /\r?\n$/u;

lib/internal/watch_mode/files_watcher.js

@@ -14,7 +14,7 @@ const { TIMEOUT_MAX } = require('internal/timers');
 
 const EventEmitter = require('events');
 const { watch } = require('fs');
-const { fileURLToPath } = require('url');
+const { fileURLToPath } = require('internal/url');
 const { resolve, dirname } = require('path');
 const { setTimeout } = require('timers');