[Feature] Add test for histogram metric

### Search before asking

- [X] I searched in the [issues](https://github.com/apache/incubator-paimon/issues) and found nothing similar.


### Motivation

Add test for paimon histogram metric

### Solution

subtask of #742 

### Anything else?

_No response_

### Are you willing to submit a PR?

- [X] I'm willing to submit a PR!