Support registering writable data-source for GatewayFlowRule and customized ApiDefinition

[fuzhanwei]

WritableDataSourceRegistry 和 GatewayRuleManager不支持GatewayFlowRule注册写数据源

[sentinel-bot]

Hi @fuzhanwei, we detect non-English characters in the issue. This comment is an auto translation from @sentinel-bot to help other users to understand this issue.
We encourage you to describe your issue in English which is more friendly to other users.

Gateway mode traffic limiting rule GatewayFlowRule does not support extended registration write data source

WritableDataSourceRegistry and GatewayRuleManager do not support GatewayFlowRule registration write data source

[sczyh30]

Maybe we could just support registering the WritableDataSource in their respective command handler (e.g. UpdateGatewayApiDefinitionGroupCommandHandler and UpdateGatewayRuleCommandHandler).

An example is ModifyParamFlowRulesCommandHandler. Contributions are welcomed!

[zhaoyuguang]

I wanna try to finish this issue~

[mark8866]

I had finished this issue~.

[sczyh30]

👍 Looking forward to your PR!

[yjygalb]

@zhangyide I have pushed gateway rules and apidefinition to zookeeper,but I can not read them from the client side using ZookeeperDataSource, can you show me hao to read them from the client side,thx.