MDL-77350 completion: Added class properties that are not declared

In PHP 8.2 and later, setting a value to an undeclared class property is
deprecated and emits a deprecation notice.
So we need to add missing class properties that still need to be declared.

completion/completion_completion.php

@@ -66,6 +66,8 @@ class completion_completion extends data_object {
     /* @var int Flag to trigger cron aggregation (timestamp) */
     public $reaggregate;
 
+    /** @var float user's course grade. */
+    public $gradefinal;
 
     /**
      * Finds and returns a data_object instance based on params.

completion/criteria/completion_criteria.php

@@ -152,6 +152,12 @@ abstract class completion_criteria extends data_object {
     /* @var int Role ID that has the ability to mark a user as complete (for role completion) */
     public $role;
 
+    /** @var string course instance. */
+    public $courseinstance;
+
+    /** @var mixed time end. */
+    public $timeend;
+
     /**
      * Finds and returns all data_object instances based on params.
      *

completion/data_object.php

@@ -64,6 +64,9 @@ abstract class data_object {
     /* @var int The primary key */
     public $id;
 
+    /** @var int completed status. */
+    public $completedself;
+
 
     /**
      * Constructor. Optionally (and by default) attempts to fetch corresponding row from DB.