Fix issues boards unable to fetch issues for anonymous users

What does this MR do and why?

This broke in !176063 (merged).

References

Please include cross links to any resources that are relevant to this MR. This will give reviewers and future readers helpful context to give an efficient review of the changes introduced.

• See the related issue on Sentry https://new-sentry.gitlab.net/organizations/gitlab/issues/1256389/?project=3

MR acceptance checklist

Please evaluate this MR against the MR acceptance checklist. It helps you analyze changes to reduce risks in quality, performance, reliability, security, and maintainability.

Screenshots or screen recordings

Before	After

How to set up and validate locally

Go to https://gdk.test:3000/Commit451/lab-coat/-/boards without being signed in.

You can also go to https://gitlab.com/groups/issue-reproduce/-/boards?milestone_title=Started without being signed in to reproduce it on gitlab.com.

Related to #461855 (closed)