bug #33282 [HttpKernel] Do not extend the new SF 4.3 ControllerEvent …

…so we can make it final (Tobion)

This PR was merged into the 4.3 branch.

Discussion
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[HttpKernel] Do not extend the new SF 4.3 ControllerEvent so we can make it final

| Q             | A
| ------------- | ---
| Branch?       | 4.3
| Bug fix?      | no
| New feature?  | no <!-- please update src/**/CHANGELOG.md files -->
| BC breaks?    | unlikely
| Deprecations? | no <!-- please update UPGRADE-*.md and src/**/CHANGELOG.md files -->
| Tests pass?   | yes    <!-- please add some, will be required by reviewers -->
| Fixed tickets |
| License       | MIT
| Doc PR        |

See #33152 (comment)
Remember the ControllerEvent is new in SF 4.3 so we just go back to what it was before 4.3

Commits
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00140b6 Do not extend the new SF 4.3 ControllerEvent so we can make it final

src/Symfony/Component/HttpKernel/Event/FilterControllerArgumentsEvent.php

@@ -17,7 +17,7 @@
 /**
  * @deprecated since Symfony 4.3, use ControllerArgumentsEvent instead
  */
-class FilterControllerArgumentsEvent extends ControllerEvent
+class FilterControllerArgumentsEvent extends FilterControllerEvent
 {
     private $arguments;