…#[AsEventListener]` (HypeMC)

This PR was merged into the 7.4 branch.

Discussion
----------

[EventDispatcher][FrameworkBundle] Rework union types on `#[AsEventListener]`

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

This is a reimplementation of #61252.
The previous PR introduced a backward compatibility break.

Consider the following listener:

```php
final class TestListener
{
    #[AsEventListener(event: RequestEvent::class)]
    public function onRequestEvent(): void
    {
        // ...
    }
}
```

In earlier versions, this worked fine, but now it throws:

> AsEventListener attribute requires the first argument of "App\EventListener\TestListener::onRequestEvent()" to be an event object.

Interestingly, there *was* a test for this scenario, but since each test method re-defines the `registerAttributeForAutoconfiguration()` closure (which wasn't updated everywhere), the tests still passed.

Additionally, the implementation was added to the `FrameworkExtension`, even though similar logic already existed in `RegisterListenersPass::getEventFromTypeDeclaration()`, resulting in a decentralized implementation.

This PR reverts the changes in `FrameworkExtension` and re-implements the feature in `RegisterListenersPass`.
The tests now reuse the closure from `FrameworkExtension` to make them more robust and consistent with the actual implementation.

Commits
-------

8ea7196 [EventDispatcher][FrameworkBundle] Rework union types on `#[AsEventListener]`