Issue #3463440 by mstrelan, smustgrave: Fix param docs identified by phpstan

composer/Plugin/Scaffold/Handler.php

composer/Plugin/VendorHardening/VendorHardeningPlugin.php

...nt/DependencyInjection/Dumper/OptimizedPhpArrayDumper.php

core/lib/Drupal/Component/Gettext/PoHeader.php

core/lib/Drupal/Component/Gettext/PoItem.php

core/lib/Drupal/Core/Ajax/InsertCommand.php

core/lib/Drupal/Core/Block/Attribute/Block.php

core/lib/Drupal/Core/Config/ConfigInstallerInterface.php

core/lib/Drupal/Core/Extension/ModuleInstaller.php

core/lib/Drupal/Core/Test/FunctionalTestSetupTrait.php

core/modules/rest/tests/src/Functional/ResourceTestBase.php

...ts/Drupal/Tests/Core/Utility/UnroutedUrlAssemblerTest.php