…atcher' service (lyrixx)This PR was submitted for the 4.4 branch but it was merged into the 3.4 branch instead (closes#32421).Discussion----------[EventDispatcher] Add tag kernel.rest on 'debug.event_dispatcher' service| Q             | A| ------------- | ---| Branch?       | 4.4| Bug fix?      | no| New feature?  | yes| BC breaks?    | no| Deprecations? || Tests pass?   | yes| Fixed tickets || License       | MIT| Doc PR        |In CLI, Symfony leaks because it uses the TraceableEventDispatcher.Let's make this service resetable.This PR is related to#32418---Side note: Forcing user to use the `ServicesResetter` is IMHO bad forthe DX. I prefer to have something that does not leak by default.More over, the TraceableEventDispatcher stores some informations for theprofiler. But in CLI it does not make sens, since the tooling does notexist. I have already fixed such issue for monolog in#30339. I think weshould do the same for the TraceableEventDispatcher.---Note: When using#32418 + this PR and with the following code, it does not leak **at all**<details><summary>code</summary>```php<?phpnamespace App\Command;use Psr\Log\LoggerInterface;use Symfony\Component\Console\Command\Command;use Symfony\Component\Console\Input\InputArgument;use Symfony\Component\Console\Input\InputInterface;use Symfony\Component\Console\Input\InputOption;use Symfony\Component\Console\Output\OutputInterface;use Symfony\Component\Console\Style\SymfonyStyle;use Symfony\Component\EventDispatcher\Event;use Symfony\Component\HttpKernel\DependencyInjection\ServicesResetter;use Symfony\Contracts\EventDispatcher\EventDispatcherInterface;class LeakCommand extends Command{    protected static $defaultName = 'leak';    private $dispatcher;    private $resetter;    private $logger;    public function __construct(EventDispatcherInterface $dispatcher, ServicesResetter $resetter, LoggerInterface $logger)    {        $this->dispatcher = $dispatcher;        $this->resetter = $resetter;        $this->logger = $logger;        parent::__construct();    }    protected function execute(InputInterface $input, OutputInterface $output)    {        $this->dispatcher->addListener(MyEvent::class, function ($e) {        });        for ($i=0; $i < INF; $i++) {            $output->writeln(memory_get_usage());            $this->dispatcher->dispatch(new MyEvent());            $this->logger->debug('some log');            // if ($i > 2000) {            //     meminfo_dump(fopen('/tmp/my_dump_file.json', 'w'));            //     die;            // }            usleep(100);            $this->resetter->reset();        }    }}class MyEvent {}```</detail>Commits-------5249eaf [EventDispatcher] Add tag kernel.rest on 'debug.event_dispatcher' service

This PR was merged into the 4.4 branch.Discussion----------[Console] Added Application::reset()| Q             | A| ------------- | ---| Branch?       | 4.4| Bug fix?      | no| New feature?  | yes| BC breaks?    | no| Deprecations? | no| Tests pass?   | yes| Fixed tickets || License       | MIT| Doc PR        |Symfony leaks a lot in CLI when using the EventDispatcher. I'm working on it.But instead of fixing the root cause, it can be legit to go quick and to reset all services.So IMHO, this services should be exposed, and always availableCommits-------15ba579 [Console] Added Application::reset()