PHPT: `require` with invalid path not reported

[staabm]

Q	A
PHPUnit version	12.4-ge6071930d
PHP version	8.3.24
Installation Method	cloned repo sources

Summary

running a PHPT test with a require and a non existing path does not error/warn and just runs the test

Current behavior

test will be executed

How to reproduce

--SKIPIF--
<?php declare(strict_types=1);
require __DIR__ . '/some/non/existing/file.php';

--FILE--
<?php declare(strict_types=1);

echo "hello world\n";
--EXPECT--
hello world

Expected behavior

phpunit runner warning about require of non-existant file

[staabm]

implemented #6312