Ensure issue status counts are scoped

What does this MR do?

Resolves #238569 (closed).

The Issue counts resolver that we use to show counts in the Incident page is not scoped by Project, as the project_id / group_id is added to the Finder in the IssuableLoader via the IssuesResolver.

As we don't use the IssuableLoader we have to add this manually.

Screenshots

Does this MR meet the acceptance criteria?

Conformity

• Changelog entry
• Documentation (if required)
• Code review guidelines
• Merge request performance guidelines
• Style guides
• Database guides
• Separation of EE specific content