std.heap.DebugAllocator: disable already flaky test

tracked by #22731

counterpart to ef1ddbe2f03a165c86af4e2dd36178b1d8661ebe
e3b7cad81eAndrew Kelley committed on 1/4/2026, 3:29:35 PMparentde25a6f
1 file changedLine totals unavailable