Refactored provider.php to use imported interfaces and single-line implements

Replaced fully qualified interface names with imported aliases via "use" statements.
This keeps the implements list under the line-length limit and avoids a conflict between
the Moodle line-length sniff and the Universal.AlphabeticExtendsImplements sniff.

Author: mdjnelson

classes/privacy/provider.php

@@ -24,10 +24,13 @@
 namespace mod_customcert\privacy;
 
 use core_privacy\local\metadata\collection;
+use core_privacy\local\metadata\provider as metadata_provider;
 use core_privacy\local\request\approved_contextlist;
 use core_privacy\local\request\approved_userlist;
 use core_privacy\local\request\contextlist;
+use core_privacy\local\request\core_userlist_provider;
 use core_privacy\local\request\helper;
+use core_privacy\local\request\plugin\provider as plugin_provider;
 use core_privacy\local\request\transform;
 use core_privacy\local\request\userlist;
 use core_privacy\local\request\writer;
@@ -38,10 +41,7 @@
  * @copyright  2018 Mark Nelson <[email protected]>
  * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  */
-class provider implements
-    \core_privacy\local\metadata\provider,
-    \core_privacy\local\request\plugin\provider,
-    \core_privacy\local\request\core_userlist_provider {
+class provider implements core_userlist_provider, metadata_provider, plugin_provider {
     /**
      * Return the fields which contain personal data.
      *