du: make du -a -s error

[oech3]

Closes #11913

[github-actions]

GNU testsuite comparison:

Skip an intermittent issue tests/tail/symlink (fails in this run but passes in the 'main' branch)
Skipping an intermittent issue tests/date/date-locale-hour (passes in this run but fails in the 'main' branch)
Congrats! The gnu test tests/printf/printf-surprise is now passing!

[codspeed-hq]

Too many benchmarks in a single upload

The performance report could not be generated because there were too many benchmarks in a single upload to CodSpeed. We recommend sharding your benchmarks into smaller uploads, with max 1000 benchmarks per upload. See the documentation for more information.

[cakebaker]

Thanks!