Fix default-bindings kit import transformation issue · Pull Request !3731 · OpenHarmony/developtools_ace_ets2bundle

## Issue

https://gitee.com/openharmony/developtools_ace_ets2bundle/issues/IANSTV?from=project-issue

## Reason
When developer use defaultBindings imports to import a kit following with other kits likes this:
```ts
import { buffer } from '@kit.ArkTS';
import XXX from '@kit.SomeKit'；

let a = buffer;
let b = XXX;
```
after compilation, the default-bindings kit import was transformed into upper kit import statement in the generated intermeidate file like this:
```ts
import { buffer } from '@kit.ArkTS';
import { buffer } from '@kit.ArkTS'; // error

let a = buffer;
let b = XXX;
```
And eventually it would cause compilation-error. And this issue is caused by `currentKitInfo` has not been re-initialized and use last one as the `currentKitInfo` to handle the [defaultBindings] kit import  transformation

## Description
Set undefined at the begin of `processKitInfo`

## Test

* ArkTest
![输入图片说明](https://foruda.gitee.com/images/1725338972521728613/7a10fcb8_7890708.png "屏幕截图")

* UI test
![输入图片说明](https://foruda.gitee.com/images/1725282597822567868/131f1f6b_7890708.png "屏幕截图")

![输入图片说明](https://foruda.gitee.com/images/1725282583439352811/766b1ea1_7890708.png "屏幕截图")

![输入图片说明](https://foruda.gitee.com/images/1725282569733359942/0e2ae00d_7890708.png "屏幕截图")

* App test

![输入图片说明](https://foruda.gitee.com/images/1725280326341826236/606f50cb_7890708.png "屏幕截图")

![输入图片说明](https://foruda.gitee.com/images/1725280309251911709/19595e68_7890708.png "屏幕截图")

类型	指派人员	状态
审查	@klooer 由 .gitee/CODEOWNERS 文件第 40 行指派为审查者	已完成 (1/1人)
审查	chenqy930 已审查通过 chengongping lihong houhaoyu	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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