meta-openharmony: SOURCE_MIRROR_URL_CH point to china IP Huawei Cloud Service data center
job `.bitbake:` define variable SOURCE_MIRROR_URL_CH pointing to Huawei Cloud Service data center.
https://gitlab.eclipse.org/eclipse/oniro-core/meta-openharmony/-/blob/kirkstone/.gitlab-ci.yml#L98
```
SOURCE_MIRROR_URL_CH: http://114.116.235.68/source-mirror
```
And the sync is done on `after_script`in `fetch` job with this particular condition:
https://gitlab.eclipse.org/eclipse/oniro-core/meta-openharmony/-/blob/kirkstone/.gitlab-ci.yml#L254
```yaml
- if [ "$CI_SERVER_HOST" = "gitlab.eclipse.org" -a
"$CI_PROJECT_PATH" = "eclipse/oniro-core/meta-openharmony" -a
"$CI_COMMIT_BRANCH" = "kirkstone" ] ; then
DO_MIRROR_UPDATES_CH=1 ;
fi
```
What do we do with these configuration?
issue