dev#175476 : Add C3RB CAS identity provider

FEATURES/175476

+        '175476' =>
+            ['Label' => $this->_('CAS2 C3RB et récupération des attributs'),
+             'Desc' => '',
+             'Image' => '',
+             'Video' => '',
+             'Category' => '',
+             'Right' => function($feature_description, $user) {return true;},
+             'Wiki' => '',
+             'Test' => '',
+             'Date' => '2023-04-05'],
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