Merge branch 'pedropombeiro/fix-flakey-test' into 'master'

Fix flaky MergeRequestUserEntity test

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/106056



Merged-by: Etienne Baqué <ebaque@gitlab.com>
Approved-by: Etienne Baqué <ebaque@gitlab.com>
Co-authored-by: Pedro Pombeiro <noreply@pedro.pombei.ro>