GHSA-h864-m8vm-3xvj: oqs's Post-Quantum Signature scheme Rainbow level I parametersets broken

Ward Beullens found a practical key-recovery attack against Rainbow. The level I parametersets are removed from liboqs starting from version 0.7.2. Find the scientific details in Breaking Rainbow Takes a Weekend on a Laptop.

This means all the oqs::sig::Algorithm::RainbowI* variants are insecure.