fix 8.2 add AllowDynamicProperties in ForbiddenSetterSniff class

[Enz000]

Q	A
Bug fix?	no
New feature?	no

Since 8.2, dynamic properties are deprecated.

An error message is displayed when I ran phpinsights on my project.

PHP Deprecated: Creation of dynamic property NunoMaduro\PhpInsights\Domain\Sniffs\ForbiddenSetterSniff::$exclude is deprecated in /Users/enzo/dev/phpinsights/src/Domain/InsightLoader/SniffLoader.php on line 32

The SniffLoader class uses the dynamic properties pattern

   public function load(string $insightClass, string $dir, array $config, Collector $collector): Insight
    {
        /** @var SniffContract $sniff */
        $sniff = new $insightClass();

        foreach ($config as $property => $value) {
            $sniff->{$property} = $value;
        }

        return new SniffDecorator($sniff, $dir);
    }

There's multiple solutions to avoid this depreciation, I'm available to discuss it 😁

[cmgmyr]

closing in favor of #653. Thank you for the PR!