The test was misidentified as a "fail", when it actually has a very high failure rate (>95%). The test happened to pass twice within the last week, so let's mark this test as a flake. Signed-off-by: Martin Roukala (né Peres) <martin.roukala@mupuf.org> Reviewed-by: Samuel Pitoiset <samuel.pitoiset@gmail.com> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/17131>