feature symfony#61078 [Console] Add getter for the original command "code" object (weitzman)

This PR was merged into the 7.4 branch.

Discussion
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[Console] Add getter for the original command "code" object

| Q             | A
| ------------- | ---
| Branch?       | 7.4
| Bug fix?      | no
| New feature?  | yes
| Deprecations? | no
| License       | MIT

I'm playing with Invokable Commands and am seeing a limitation which is bothersome. Attributes attached to the invokable class are lost by the time we have a  `Command` added to the Application. Consider an invokable class like below. The #[CLI\FieldLabels] and #[CLI\DefaultFields] Attributes are not retrievable from the Command. That is, there is no easy way to access the actual InvokableCommand object instead of the [wrapping Command](https://github.com/symfony/symfony/blob/a384c231a0051c0ac10e89c2a0516343f9fd3187/src/Symfony/Component/Console/Application.php#L553).

With this PR, Attributes become accessible via `$command->getCode()->getCallable()`

```php
namespace Drush\Commands\core;

#[AsCommand(
    name: 'twig:unused',
    description: 'Find potentially unused Twig templates.',
    aliases: ['twu'],
)]
#[CLI\FieldLabels(labels: ['template' => 'Template', 'compiled' => 'Compiled'])]
#[CLI\DefaultFields(fields: ['template', 'compiled'])]
final class TwigUnusedCommand
{
    public function __invoke(
        #[Argument(description: 'A comma delimited list of paths to recursively search')] string $searchpaths,
        InputInterface $input,
        OutputInterface $output
    ): int
    {
        $data = $this->doExecute($searchpaths);
        $this->writeFormattedOutput($input, $output, $data);
        return Command::SUCCESS;
    }
}
```

Commits
-------

825643d [Console] Add getter for the original command "code" object

Author: GromNaN

src/Symfony/Component/Console/CHANGELOG.md

@@ -4,7 +4,7 @@ CHANGELOG
 7.4
 ---
 
- * Add `Command::getCode()` to get the code set via `setCode()`.
+ * Add `Command::getCode()` to get the code set via `setCode()`
  * Allow setting aliases and the hidden flag via the command name passed to the constructor
  * Introduce `Symfony\Component\Console\Application::addCommand()` to simplify using invokable commands when the component is used standalone
  * Deprecate `Symfony\Component\Console\Application::add()` in favor of `Symfony\Component\Console\Application::addCommand()`