Add sub-nav for Project Integration Services edit page
What does this MR do?
Services' edit page under
Project -> Settings -> Integration doesn't show sub-nav, this MR adds missing sub-nav.
Why was this MR needed?
Since we moved project settings from dropdown menu to nav tab, sub-nav is not shown in services' edit page, this MR fixes the same.
Does this MR meet the acceptance criteria?
- Changelog entry added, if necessary
[ ] Documentation created/updated [ ] API support added
[ ] Added for this feature/bug
- All builds are passing
- Conform by the merge request performance guides
- Conform by the style guides
Branch has no merge conflicts with
master(if it does - rebase it please)
- Squashed related commits together
What are the relevant issue numbers?
Closes #31174 (closed)