[Observability] Error code information is added during exception statistics.

Observability: Error code information is added during exception statistics. Currently, there are error codes in Dubbo's exceptions. Attempt to collect both the exception and this error code information when an exception occurs.
The error code link is as follows:
https://cn.dubbo.apache.org/zh-cn/overview/mannual/java-sdk/faq/

【可观测性】异常统计时增加错误码信息，目前 dubbo的 异常中都存在错误码 ，尝试在发生异常时候采集异常 同时采集这个错误码信息。
错误码链接如下：
https://cn.dubbo.apache.org/zh-cn/overview/mannual/java-sdk/faq/