Add workflow with transition constant

[tacman]

I added workflow.yaml, with the following contents, to address #4436

framework:
    workflows:
        plant:
            supports: [App\Entity\Plant]
            places: [seed, planted]
            transitions:
                !php/const App\Entity\Plant::TRANSITION_PLANT:
                    from: seed
                    to:   planted
-----
<?php

    declare(strict_types=1);

    use App\Entity\Plant;
    use Symfony\Component\DependencyInjection\Loader\Configurator\ContainerConfigurator;

return static function (ContainerConfigurator $containerConfigurator): void {
    $containerConfigurator->extension('framework', ['workflows' => ['plant' => ['supports' => [Plant::class], 'places' => ['seed', 'planted'], 'transitions' => ['plant' => ['from' => 'seed', 'to' => 'planted']]]]]);
};

[TomasVotruba]

Closing as duplicate of #4440