[JENKINS-60138] Fixed job links for jobs in folders

[balakine]

Use getUrl() instead of reinventing its logic in jelly

https://issues.jenkins.io/browse/JENKINS-60138

Testing done

Go to the jobs list and click on any job that lives in a subfolder. The url should be correct now.

### Submitter checklist
- [x] Make sure you are opening from a **topic/feature/bugfix branch** (right side) and not your main branch!
- [x] Ensure that the pull request title represents the desired changelog entry
- [x] Please describe what you did
- [x] Link to relevant issues in GitHub or Jira
- [ ] Link to relevant pull requests, esp. upstream and downstream changes
- [x] Ensure you have provided tests - that demonstrates feature works or fixes the issue

[MarkEWaite]

My interactive testing found no issue.