test: replace fixturesDir with fixtures module

PR-URL: #15989
Reviewed-By: Joyee Cheung <[email protected]>
Reviewed-By: Colin Ihrig <[email protected]>

Author: hschwalm

test/es-module/test-esm-encoded-path-native.js

@@ -1,9 +1,10 @@
 'use strict';
-const common = require('../common');
+require('../common');
+const fixtures = require('../common/fixtures');
 const assert = require('assert');
 const { spawn } = require('child_process');
 
-const native = `${common.fixturesDir}/es-module-url/native.mjs`;
+const native = fixtures.path('es-module-url/native.mjs');
 const child = spawn(process.execPath, ['--experimental-modules', native]);
 child.on('exit', (code) => {
   assert.strictEqual(code, 1);