Fix for-of cannot traverse Iterable · Pull Request !6872 · OpenHarmony/arkcompiler_ets_frontend

### 关联的Issue
https://gitee.com/openharmony/arkcompiler_ets_frontend/issues/ICKY3Y

### 提交类型
- [ ] 需求
- [ ] bugfix

### 需求背景/Description 
Original question:Invalid CTE
```
function deleteInTxInternal(entities: Iterable<string>): void {
  for (let entity of entities) {
// TypeError: Iterator method must return an object which implements Iterator<T> [tmpcw6qvlwh.ets:2:22]
// TypeError: 'For-of' statement source expression is not of iterable type. [tmpcw6qvlwh.ets:2:22]
    console.log(`Deleting entity: ${entity}`);
  }
}
```

Problem Description:
During the iterator check, only whether the ETSObjectType implements the Iterable interface is checked, but the situation that the ETSObjectType is Iterable is omitted.

Fix: 
Allow Iterable as a return iterator return value.

### 问题现象&&分析/Reason 
During the iterator check, only whether the ETSObjectType implements the Iterable interface is checked, but the situation that the ETSObjectType is Iterable is omitted.

### 修改方案/Scheme
Allow Iterable as a return iterator return value.

Test
ninja tests(passed)
ets_testrunner(passed)

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 gavin1012_hw 已审查通过徐城 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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