[Bug] window assigns error

### Search before asking

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

### Version

操作系统：CentOS 7.9
IoTDB：1.1.1

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

window assigns in group by is different in same logic
### execute insert sql
`insert into root.hess.test.AK1407120700022.testdata (timestamp, epv_total, eload_total) VALUES (2592000000,1,1),(5011199999,2,2),(5011200000,3,3),(7689599999,4,4),(7689600000,5,5)`
`insert into root.hess.test.AK1407120700022.testdata (timestamp, epv_total, eload_total) VALUES (2563200000,10,10),(4982399999,20,20),(4982400000,30,30),(7660799999,40,40),(7660800000,50,50)`
### then execute query sql
`select SUM(epv_total) as pv,SUM(eload_total) as load from root.hess.**.AK1407120700022.** group by ([1970-02-28T08:00:00, 1970-05-31), 1mo , 2mo)`
`select SUM(epv_total) as pv,SUM(eload_total) as load from root.hess.**.AK1407120700022.** group by ([1970-02-28T08:00:00, 1970-05-31), 1mo , 1mo)`

### What did you expect to see?

IoTDB> select SUM(epv_total) as pv,SUM(eload_total) as load from root.hess.**.AK1407120700022.** group by ([1970-02-28T08:00:00, 1970-05-31), 1mo , 2mo)
+-----------------------------+----+----+
| Time| pv|load|
+-----------------------------+----+----+
|1970-02-28T08:00:00.000+08:00|97.0|97.0|
|1970-04-30T08:00:00.000+08:00|null|null|
+-----------------------------+----+----+
Total line number = 2
It costs 0.025s
IoTDB> select SUM(epv_total) as pv,SUM(eload_total) as load from root.hess.**.AK1407120700022.** group by ([1970-02-28T08:00:00, 1970-05-31), 1mo , 1mo)
+-----------------------------+----+----+
| Time| pv|load|
+-----------------------------+----+----+
|1970-02-28T08:00:00.000+08:00|97.0|97.0|
|1970-03-31T08:00:00.000+08:00| 5.0| 5.0|
|1970-04-30T08:00:00.000+08:00|null|null|
+-----------------------------+----+----+
Total line number = 3

### What did you see instead?


### Anything else?

_No response_

### Are you willing to submit a PR?

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

記載された行を挿入した後、提供されている2つの GROUP BY クエリを IoTDB 1.1.1 に対して実行し、1mo, 2mo と 1mo, 1mo の結果を比較する。クエリエンジンにおけるウィンドウ割り当ての動作を追跡する。完了条件は、同等のウィンドウロジックによって一貫した区間割り当てが生成され、再現クエリが期待される行を返すこと。

索引モデルが issue の本文から書いたものです。