[BUGFIX] Mitigate deprecated extbase ViewInterface

TYPO3 v11.5 started streamlining the view implementation,
which included deprecating the extbase `ViewInterface`.
Extensions supporting two TYPO3 core version need to take
care and the migration path for controllers overriding the
`initialzeView` method is stated in the changelog [1].

This change follows the recommended migration path and
removes the deprecated interface as method native type
declarion for the `$view` argument, avoiding in TYPO3
v12 the exception

  TYPO3\CMS\Extbase\Reflection\Exception\UnknownClassException
  Class "TYPO3\CMS\Extbase\Mvc\View\ViewInterface" does not exist.
  Reflection failed.

while still making required adjustments.

[1] https://docs.typo3.org/c/typo3/cms-core/main/en-us/Changelog/11.5/Deprecation-95222-ExtbaseViewInterface.html

Resolves: #22

Author: sbuerk

Classes/Controller/CleanupController.php

@@ -25,7 +25,6 @@
 use TYPO3\CMS\Core\Resource\ResourceStorage;
 use TYPO3\CMS\Core\Utility\GeneralUtility;
 use TYPO3\CMS\Extbase\Mvc\Controller\ActionController;
-use TYPO3\CMS\Extbase\Mvc\View\ViewInterface;
 use WebVision\WvFileCleanup\Domain\Repository\FileRepository;
 
 /**
@@ -64,7 +63,11 @@ public function initializeAction(): void
         $this->moduleTemplate = $this->moduleTemplateFactory->create($this->request);
     }
 
-    public function initializeView(ViewInterface $view): void
+    /**
+     * Note that `$view` does not have native type declaration by intention to follow the recommended migration path for
+     * https://docs.typo3.org/c/typo3/cms-core/main/en-us/Changelog/11.5/Deprecation-95222-ExtbaseViewInterface.html.
+     */
+    public function initializeView($view): void
     {
         $this->pageRenderer->loadRequireJsModule('TYPO3/CMS/Backend/ContextMenu');
         $this->pageRenderer->loadRequireJsModule('TYPO3/CMS/WvFileCleanup/Cleanup');