bug #45532 Fix deprecations on PHP 8.2 (nicolas-grekas)

This PR was merged into the 4.4 branch.

Discussion
----------

Fix deprecations on PHP 8.2

| Q             | A
| ------------- | ---
| Branch?       | 4.4
| Bug fix?      | yes
| New feature?  | no
| Deprecations? | no
| Tickets       | On the road to #44282
| License       | MIT
| Doc PR        | -

Commits
-------

ca566204d3 Fix deprecations on PHP 8.2

Author: nicolas-grekas

Tests/Constraints/ImageValidatorTest.php

@@ -33,6 +33,7 @@ class ImageValidatorTest extends ConstraintValidatorTestCase
     protected $imageLandscape;
     protected $imagePortrait;
     protected $image4By3;
+    protected $image16By9;
     protected $imageCorrupted;
     protected $notAnImage;