Merge branch '5.2' into 5.3

* 5.2:
  CS fix
  Missing translations from traits
  Fix SkippedTestSuite
  [Console] Fix type annotation on InputInterface::hasArgument()
  Revert "minor #41949 [Console] fix type annotations on InputInterface (nicolas-grekas)"
  [EventDispatcher] Correct the called event listener method case
  Add missing translations for Japanese.
  Revert "bug #41952 [Console] fix handling positional arguments (nicolas-grekas)"
  fix backport

DependencyInjection/TranslatorPathsPass.php

@@ -64,6 +64,9 @@ public function process(ContainerBuilder $container)
             foreach ($this->paths as $class => $_) {
                 if (($r = $container->getReflectionClass($class)) && !$r->isInterface()) {
                     $paths[] = $r->getFileName();
+                    foreach ($r->getTraits() as $trait) {
+                        $paths[] = $trait->getFileName();
+                    }
                 }
             }
             if ($paths) {