Observability task: health check is compatible with SpringBoot's health check and readability check

[conghuhu]

• [x] I have searched the issues of this repository and believe that this is not a duplicate.

Describe the proposal

中文: SpringBoot actuator提供了健康检查的endpoint，Dubbo需兼容SpringBoot的健康检查，可参考Spring Boot 健康检查

en: SpringBoot actor provides the endpoint of health check. Dubbo should be compatible with SpringBoot health check. Please refer to Spring Boot health check

[gsralex]

plz assign to me, thanks

[gsralex]

中文： 我看需要实现spring的HealthIndicator/AbstractHealthIndicator ，并且使用dubbo 的statusChecker的实现类去做。但是我找到一个已存在的类（org.apache.dubbo.spring.boot.actuate.health.DubboHealthIndicator），我需要在这个类的基础上去做吗？

en: I think it needs to implement spring HealthIndicator/AbstractHealthIndicator and use various implementation classes of dubbo statusChecker. But I found an existing class（org.apache.dubbo.spring.boot.actuate.health.DubboHealthIndicator）, need I do it on the basis of the existing class?