minor symfony#53349 [Form] Adding more @var PHPDoc's to silence psalm (ThomasLandauer)

This PR was squashed before being merged into the 6.4 branch.

Discussion
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[Form] Adding more ``@var`` PHPDoc's to silence psalm

| Q             | A
| ------------- | ---
| Branch?       | 6.4
| Bug fix?      | yes (kind of)
| New feature?  | no
| Deprecations? | no
| Issues        | none
| License       | MIT

... as announced in symfony#52861 (comment)

Commits
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e47b557 [Form] Adding more ``@var`` PHPDoc's to silence psalm

Author: nicolas-grekas

src/Symfony/Component/Form/Extension/Core/Type/FileType.php

@@ -12,6 +12,7 @@
 namespace Symfony\Component\Form\Extension\Core\Type;
 
 use Symfony\Component\Form\AbstractType;
+use Symfony\Component\Form\Event\PreSubmitEvent;
 use Symfony\Component\Form\FileUploadError;
 use Symfony\Component\Form\FormBuilderInterface;
 use Symfony\Component\Form\FormEvent;
@@ -48,6 +49,7 @@ public function buildForm(FormBuilderInterface $builder, array $options)
     {
         // Ensure that submitted data is always an uploaded file or an array of some
         $builder->addEventListener(FormEvents::PRE_SUBMIT, function (FormEvent $event) use ($options) {
+            /** @var PreSubmitEvent $event */
             $form = $event->getForm();
             $requestHandler = $form->getConfig()->getRequestHandler();
 

src/Symfony/Component/Form/Extension/Core/Type/TimeType.php

@@ -18,6 +18,7 @@
 use Symfony\Component\Form\Extension\Core\DataTransformer\DateTimeToArrayTransformer;
 use Symfony\Component\Form\Extension\Core\DataTransformer\DateTimeToStringTransformer;
 use Symfony\Component\Form\Extension\Core\DataTransformer\DateTimeToTimestampTransformer;
+use Symfony\Component\Form\Event\PreSubmitEvent;
 use Symfony\Component\Form\FormBuilderInterface;
 use Symfony\Component\Form\FormEvent;
 use Symfony\Component\Form\FormEvents;
@@ -62,6 +63,7 @@ public function buildForm(FormBuilderInterface $builder, array $options)
 
         if ('single_text' === $options['widget']) {
             $builder->addEventListener(FormEvents::PRE_SUBMIT, static function (FormEvent $e) use ($options) {
+                /** @var PreSubmitEvent $event */
                 $data = $e->getData();
                 if ($data && preg_match('/^(?P<hours>\d{2}):(?P<minutes>\d{2})(?::(?P<seconds>\d{2})(?:\.\d+)?)?$/', $data, $matches)) {
                     if ($options['with_seconds']) {