remove version from doc blocs

- @version in file header level isn't used on code docs, it is intended
  for API versions at class or method level
- avoids needing to update all these files on version increment
- avoids needing to regenerate SRI hashes for privatebin.js through
  extra phpunit run
- simplifies VERSION_FILES list
- avoids having to filter above list during loop
- adds a few missing doc bloc headers

lib/Data/S3Storage.php

@@ -1,15 +1,15 @@
 <?php
 /**
- * S3.php
+ * PrivateBin
  *
- * an S3 compatible data backend for PrivateBin with CEPH/RadosGW in mind
- * see https://docs.ceph.com/en/latest/radosgw/s3/php/
- * based on lib/Data/GoogleCloudStorage.php from PrivateBin version 1.7.3
+ * a zero-knowledge paste bin
  *
  * @link      https://github.com/PrivateBin/PrivateBin
  * @copyright 2022 Felix J. Ogris (https://ogris.de/)
  * @license   https://www.opensource.org/licenses/zlib-license.php The zlib/libpng License
- * @version   1.4.1
+ *
+ * an S3 compatible data backend for PrivateBin with CEPH/RadosGW in mind
+ * see https://docs.ceph.com/en/latest/radosgw/s3/php/
  *
  * Installation:
  *   1. Make sure you have composer.lock and composer.json in the document root of your PasteBin