Refactor ones issue_tracker_path

What does this MR do and why?

Issue link: #2682 (closed)

Implemented the first part of the issue. Others require the frontend to be completed in a new MR.

Screenshots or screen recordings

Click ONES button:

Go to project page (instead of ONES home page):

How to set up and validate locally

Setup ones integration.

Doc link: https://docs.gitlab.cn/jh/user/project/integrations/ones.html

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.