Update gitlab-jh URLs to jihulab.com or mirror

What does this MR do and why?

Update gitlab-jh URLs to jihulab.com or mirror.

• Source link should use https://jihulab.com/gitlab-cn/gitlab
• Historical issues and merge requests links should stay as to keep the original context
• CI configurations should use our mirror for now https://gitlab.com/gitlab-org/gitlab-jh/gitlab (we can revisit to change to https://jihulab.com/gitlab-cn/gitlab after it's proven stable)

Screenshots or screen recordings

These are strongly recommended to assist reviewers and reduce the time to merge your change.

How to set up and validate locally

Numbered steps to set up and validate the change are strongly suggested.

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.

Related to #351016 (closed)