[ticket/17281] Update psalm config and fix issues

PHPBB3-17281

phpBB/phpbb/di/container_builder.php

@@ -587,7 +587,7 @@ class container_builder
 					$this->config_php_file->get('dbname'),
 					$this->config_php_file->get('dbport'),
 					false,
-					defined('PHPBB_DB_NEW_LINK') && PHPBB_DB_NEW_LINK
+					defined('PHPBB_DB_NEW_LINK') ? PHPBB_DB_NEW_LINK : false
 				);
 			}
 			$this->container->set('dbal.conn.driver', $this->dbal_connection);

phpBB/phpbb/di/extension/container_configuration.php

@@ -28,6 +28,7 @@ class container_configuration implements ConfigurationInterface
 	{
 		$treeBuilder = new TreeBuilder('core');
 		$rootNode = $treeBuilder->getRootNode();
+		/** @psalm-suppress UndefinedMethod */
 		$rootNode
 			->children()
 				->booleanNode('require_dev_dependencies')->defaultValue(false)->end()