Merge branch 'security-fix-DoS-on-test-report-artifacts_mr-850-15-11' into '15-11-stable-ee'

Fix DoS on test report artifacts

See merge request https://gitlab.com/gitlab-org/security/gitlab/-/merge_requests/3200



Merged-by: Jenny Kim <yjeankim@gitlab.com>
Approved-by: Ethan Urie <eurie@gitlab.com>
Approved-by: Félix Veillette-Potvin <fveillette@gitlab.com>
Co-authored-by: Dmytro Biryukov <dbiryukov@gitlab.com>