Use preg_qoute() escaping for --filter phpunit option

[staabm]

see discussion in #2916 (comment)

a test-class like

<?php
namespace TestNamespace;

use PHPUnit\Framework\TestCase;

class mytest extends TestCase
{
	/**
	 * @dataProvider provider
	 */
	public function testMethod($data)
	{
		$this->assertTrue($data);
	}

	public function provider()
	{
		return [
			'my name(d data' => [true],
			'my $dat)a'       => [true]
		];
	}
}

requires a escaped filter

➜  phpstan-src git:(1.11.x) ✗ vendor/bin/phpunit mytest.php --filter 'my $dat\)a'
PHPUnit 9.5.23 #StandWithUkraine

Warning:       No code coverage driver available

No tests executed!
➜  phpstan-src git:(1.11.x) ✗ vendor/bin/phpunit mytest.php --filter 'my \$dat\)a'
PHPUnit 9.5.23 #StandWithUkraine

Warning:       No code coverage driver available

.                                                                   1 / 1 (100%)

Time: 00:00.011, Memory: 32.00 MB

OK (1 test, 1 assertion)

[phpstan-bot]

This pull request has been marked as ready for review.

[staabm]

ahh interessting... this doesn't work when a # is part of the filter, which preg_quote() escapes but the filter does not work with. I will open an issue with phpunit