Allow kernel configuration via attributes

[jdreesen]

This is a followup of #8 and improves it by adding attributes that allow to configure the kernel instead of passing a closure to createKernel().

use Neusta\Pimcore\TestingFramework\Test\Attribute\ConfigureContainer;
use Neusta\Pimcore\TestingFramework\Test\Attribute\ConfigureExtension;
use Neusta\Pimcore\TestingFramework\Test\Attribute\RegisterBundle;
use Neusta\Pimcore\TestingFramework\Test\Attribute\RegisterCompilerPass;
use Neusta\Pimcore\TestingFramework\Test\ConfigurableKernelTestCase;

#[RegisterBundle(SomeBundle::class)]
class SomeTest extends ConfigurableKernelTestCase 
{
    #[ConfigureContainer(__DIR__ . '/Fixtures/some_config.yaml')]
    #[ConfigureExtension('some_extension', ['config' => 'values'])]
    #[RegisterCompilerPass(new SomeCompilerPass())]
    public function test_something(): void
    {
        self::bootKernel();

        // test something
    }
}

All attributes are usable on the class and test methods.

[yariksheptykin]

This is a great feature. Thanks!