Add missing VIEW permission check

Author: Discookie

web/server/codechecker_server/api/report_server.py

@@ -3017,6 +3017,8 @@ def getGuidelineRules(
         guidelines: List[ttypes.Guideline]
     ):
         """ Return the list of rules to each guideline that given. """
+        self.__require_view()
+        
         guideline_rules = defaultdict(list)
         for guideline in guidelines:
             rules = self._context.guideline.rules_of_guideline(