[linkis-httpclient ]module errorcode optimization and documentation #3423
Description
[linkis-httpclient]module errorcode optimization and documentation
Example：
documentation（文档）
Error code optimization（错误码优化）
Classes that need to be optimized（需要优化的类）
| class | path |
|---|---|
| DiscoveryException | org.apache.linkis.httpclient.exception.DiscoveryException |
| HttpClientResultException | org.apache.linkis.httpclient.exception.HttpClientResultException |
| HttpClientRetryException | org.apache.linkis.httpclient.exception.HttpClientRetryException |
| HttpMessageParseException | org.apache.linkis.httpclient.exception.HttpMessageParseException |