kt-virtual-environment/rule配置不支持corsPolicy.allowOrigins属性

使用如下json：

```json
{
"Match": [
{
"Uri": {
"Prefix": "/"
}
}
],
"corsPolicy": {
"allowOrigins": [
{
"exact": "*"
}
],
"allowCredentials": true,
"allowHeaders": [
"app-key",
"yizhou-j-token"
],
"allowMethods": [
"GET",
"POST",
"PUT",
"DELETE",
"PATCH",
"OPTIONS"
]
}
}
```

最后生成的配置


此段json未生效 `"corsPolicy":{"allowOrigins":[{"exact":"*"}]`，缺失以下配置：

```yaml
allowOrigins:
- exact: '*'
```

Reproduce the issue using the JSON configuration shown and compare it with the generated YAML. Trace how rule configuration handles corsPolicy.allowOrigins; the fix is complete when the generated configuration preserves allowOrigins with the exact value '*', and the behavior is covered by an appropriate test.

Written by the indexing model from the issue text.