Exclude the assets folder from integrity check

We should not scan the assets folder as this can contain user specific content. Partially addresses https://github.com/owncloud/core/issues/22803

lib/private/integritycheck/iterator/excludefoldersbypathfilteriterator.php

@@ -37,6 +37,7 @@ class ExcludeFoldersByPathFilterIterator extends \RecursiveFilterIterator {
 			rtrim($root .'/themes', '/'),
 			rtrim($root . '/config', '/'),
 			rtrim($root . '/apps', '/'),
+			rtrim($root . '/assets', '/'),
 		];
 		$customDataDir = \OC::$server->getConfig()->getSystemValue('datadirectory', '');
 		if($customDataDir !== '') {