...also move the 0-clamping logic to ApplyArgsManOptions, where it belongs.
This concludes backport of [[https://github.com/bitcoin/bitcoin/pull/25527 | core#25527]]
https://github.com/bitcoin/bitcoin/pull/25527/commits/0f3a2532c38074dd9789d1c4c667db6ca46ff0ab
Depends on D15378