fix(get_non_system_ks_cf_list): Filter out 'audit' keyspace

	'audit' is a system keyspace that wasn't filtered so
	nemesis selected it mistakingly as a user keyspace.
	Fixes: scylladb#5963

sdcm/cluster.py

@@ -3564,7 +3564,7 @@ def execute_cmd(cql_session, entity_type):
             for row in current_rows:
                 table_name = f"{getattr(row, column_names[0])}.{getattr(row, column_names[1])}"
 
-                if filter_out_system and getattr(row, column_names[0]).startswith(("system", "alternator_usertable")):
+                if filter_out_system and getattr(row, column_names[0]).startswith(("system", "alternator_usertable", "audit")):
                     continue
 
                 if is_column_type and (filter_out_table_with_counter and "counter" in row.type):