curl: verify-release rebuilds from the tarball under verification, enabling pre-check command execution and false OK for a malicious curl release tarball

Summary: scripts/verify-release is documented as a way to independently verify a downloaded curl release tarball, but on curl-8.20.0 it extracts the tarball under verification and executes ./configure and ./scripts/dmaketgz before any trust decision is made. This creates a circular trust failure:...