Independent requirements for generation and verification/benchmark

At the moment we have requirements.txt focus only on the generation, for two reasons iirc:

• such that CI can test and verify the generation periodically
• to keep any authentication out of the generation (and thus lower the reproduction bar for independent entities) @j.montanez-barrera suggested to have additional requirements for verification and benchmark. @KarnadAshwin do you have a bright idea how we can implement this?