Task 61904143349

ci, iwyu: Fix warnings in `src/util` and treat them as errors

2026-01-29 17:22:27 aborted 260129-iwyu-util 7e1797e917d2097c54f716be24ce1f12c5f51622

Tags

Windows, ${{ matrix.crt }}, test cross-built

260129-iwyu-util