optimize: add tcc fence hook function (apache#6731)

Author: chengliefeng

changes/en-us/2.x.md

@@ -59,7 +59,7 @@ Add changes here for all PR submitted to the 2.x branch.
 - [[#6755](https://github.com/apache/incubator-seata/pull/6755)] optimize namingserver code logic
 - [[#6763](https://github.com/apache/incubator-seata/pull/6763)] optimize NacosConfiguration singleton reload
 - [[#6761](https://github.com/apache/incubator-seata/pull/6761)] optimize the namingserver code to improve readability
-
+- [[#6766](https://github.com/apache/incubator-seata/pull/6766)] add tcc fence hook function
 
 ### refactor:
 

changes/zh-cn/2.x.md

@@ -60,7 +60,7 @@
 - [[#6755](https://github.com/apache/incubator-seata/pull/6755)] 优化namingserver代码逻辑
 - [[#6763](https://github.com/apache/incubator-seata/pull/6763)] 优化 NacosConfiguration 单例加载
 - [[#6761](https://github.com/apache/incubator-seata/pull/6761)] 提升namingserver manager代码可读性
-
+- [[#6766](https://github.com/apache/incubator-seata/pull/6766)] 添加tcc fence钩子函数, 方便用户在tcc三阶段前后进行逻辑拓展（比如多数据源的切换操作）
 
 ### refactor: