[Bug] 2.0.5版本当数据删除之后再使用last_by函数查询会有数据返回，且这条数据为null

### Search before asking

- [x] I searched in the [issues](https://github.com/apache/iotdb/issues) and found nothing similar.

### Version

2.0.5 window版本

### Describe the bug and provide the minimal reproduce step

表中对应的标签没有数据的情况下last_by查询是没有数据

给这个对应的标签添加一条数据

**问题出现**：删除这条数据之后，使用last_by 方法查询时会返回一条数据，这个数据全部返回的字段为空

### What did you expect to see?

数据删除之后使用last_by查询应该不返回任何数据

### What did you see instead?

数据删除之后使用last_by查询应该返回一条数据，而且这条数据全部字段都返回了null

### Anything else?

_No response_

### Are you willing to submit a PR?

- [ ] I'm willing to submit a PR!

Start by reproducing the reported behavior in IoTDB 2.0.5 on Windows: insert data for the relevant tag, delete it, and query with last_by. Compare the result with the expected empty result, then trace the last_by query path and add coverage for the deleted-data case. Done means last_by returns no row after the data is deleted.

Written by the indexing model from the issue text.