Merge branch '4.4' into 5.2

* 4.4:
  do not mock the Request class
  do not mock event classes
  recover from failed deserializations
  [ErrorHandle] Remove a link from the exception page
  [Validator] Added Ukrainian translations
  [GHA] Clarify some bits in the deps=high script

Author: xabbuh

Resources/views/exception_full.html.php

@@ -28,13 +28,6 @@
                             <span class="hidden-xs-down">Symfony</span> Docs
                         </a>
                     </div>
-
-                    <div class="help-link">
-                        <a href="https://symfony.com/support">
-                            <span class="icon"><?= $this->include('assets/images/icon-support.svg'); ?></span>
-                            <span class="hidden-xs-down">Symfony</span> Support
-                        </a>
-                    </div>
                 </div>
             </header>
         <?php } ?>