RuleManager should throw out an exception for invalid rule

Such as https://github.com/alibaba/Sentinel/blob/master/sentinel-core/src/main/java/com/alibaba/csp/sentinel/slots/block/authority/AuthorityRuleManager.java


当我在配置中心枚举属性（比如，只能输入0或者1）输入成一个非法格式，应该报出异常信息，现在是无任何信息显示，并且会把原有已经生效的规则给清除掉

Start with sentinel-core/src/main/java/com/alibaba/csp/sentinel/slots/block/authority/AuthorityRuleManager.java and trace how configuration-center rule updates handle invalid enum-like values. Reproduce the invalid input described in the issue; done means an exception is reported and previously effective rules are not cleared.

Written by the indexing model from the issue text.