WIP: Resolve ""New Issue" list in group/subgroup displays projects with Issues disabled - which results in 404"

What does this MR do?

Adds two new optional parameters to the /groups/:id/projects api endpoint.

Use this two new parameters to show the correct projects in the "New issue"/"New merge request" select input in the /GROUP/-/issues and /GROUP/-/merge-requests page

Why was this MR needed?

Because it shows projects with issues/merge-requests disabled in the select of this pages, and when clicked it return a 404.

Screenshots (if relevant)

Does this MR meet the acceptance criteria?

• Changelog entry added, if necessary
• Documentation created/updated
• Tests added for this feature/bug
• Review
  • Has been reviewed by Frontend
  • Has been reviewed by Backend

What are the relevant issue numbers?

Closes #40939 (closed)