Hide file integrity warnings from SEO site verification processes (#12060)

* Hide file integrity warnings from SEO site verification processes
fixes https://github.com/piwik/piwik/issues/12050

* Typo

core/FileIntegrity.php

@@ -79,8 +79,12 @@ class FileIntegrity
             'plugins/ImageGraph/fonts/unifont.ttf',
             'vendor/autoload.php',
             'vendor/composer/autoload_real.php',
-            'vendor/szymach/c-pchart/app/cache/*.db',
+            'vendor/szymach/c-pchart/app/*',
             'tmp/*',
+            // Search engine sites verification
+            'google*.html',
+            'BingSiteAuth.xml',
+            'yandex*.html',
             // Files below are not expected but they used to be present in older Piwik versions and may be still here
             // As they are not going to cause any trouble we won't report them as 'File to delete'
             '*.coveralls.yml',