pipes.rs: deduplicate many cfg's

[oech3]

No description provided.

[github-actions]

GNU testsuite comparison:

Skip an intermittent issue tests/date/date-locale-hour (fails in this run but passes in the 'main' branch)
Note: The gnu test tests/pr/bounded-memory is now being skipped but was previously passing.
Skip an intermittent issue tests/tail/tail-n0f (was skipped on 'main', now failing)

[sylvestre]

needs to be rebased

[oech3]

OK. But immediately conflicts with #12454 :|

[cakebaker]

Thanks!