arkts-no-ts-like-smart-type for loop fix · Pull Request !8008 · OpenHarmony/arkcompiler_ets_frontend

1. arkts-no-ts-like-smart-type for loop fix
---
### 关联的Issue
[Bug]: arkts-no-ts-like-smart-type for loop
https://gitee.com/openharmony/arkcompiler_ets_frontend/issues/ICU9UE

### 需求背景/Description

arkts-no-ts-like-smart-type for loop fix

### 问题现象&&分析/Reason

```
loadInitializationDataSource() {
    const context: Context = getContext(this);
    // 读取historyDownloadResourceData.json中的数据
    let jsonData: Uint8Array = context.resourceManager.getRawFileContentSync('historyDownloadResourceData.json');
    // 将数据解码，转成字符串
    let stringData: string = util.TextDecoder.create('utf-8').decodeToString(jsonData);
    let data: [] = JSON.parse(stringData) as [];
    const a = data[0] as downloadFilesData;

for (let i = 0; i=0; i++ ) {
      let data2: [] = JSON.parse(stringData) as [];
      const downloadItemData = data2[0] as downloadFilesData; ## this line should not give smart type error
      let downloadData: downloadFilesData = new downloadFilesData(downloadItemData.url, downloadItemData.fileStatus, downloadItemData.downloadTime);
      // 将数据存入下载列表
      this.downloadFileArray.push(downloadData);
    }
  }
```

### **Tests**
```
ninja all tests
```

类型	指派人员	状态
审查	@egavrin 由 CODEOWNERS 文件第 18 行指派为审查者	进行中 (0/1人)
审查	godmiaozi zhuoli72 已审查通过 gavin1012_hw 徐城 Ilya Trubachev Urakov Alexandr Chernykh Sergey Vsevolod Pukhov	已完成 (1/1人)
测试	openharmony_ci 已测试通过	已完成 (1/1人)

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