Doris FQDN 启用后，如何关闭

### Search before asking

- [x] I had searched in the [issues](https://github.com/apache/doris/issues?q=is%3Aissue) and found no similar issues.

### Description

**Doris版本： 2.1.11**

Doris 启用了FQDN。 并且配置了host 文件：
```
172.22.0.1 doris-fe1
172.22.0.2 doris-be1
...
```
并且添加be 和fe时， 也使用了 配置的 host名称(doris-fe1、doris-be1)

若是想关闭 FQDN ，能关闭吗 ？ 应该怎么做 ？

请各位大佬给出实操的步骤。

### Solution

_No response_

### Are you willing to submit PR?

- [ ] Yes I am willing to submit a PR!

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