ACVP test case scraper

[randombit]

Write a script to scrape ACVP test cases in https://github.com/usnistgov/ACVP-Server/tree/master/gen-val/json-files format and insert into our dataset.

[atreiber94]

We already have a script for ACVP KEM tests in https://github.com/randombit/botan/blob/master/src/scripts/dev_tools/gen_mlkem_acvp_kat.py and use it for ML-KEM. It could be generalized for the other cases.

For PQC, so far the ACVP test cases only cover the "internal" interfaces and give it inputs that are actually not valid. For that reason we did not use the ML-KEM "encapdecap" and any of the PQC DSA ACVP tests because there is no data we can give to Botan's interfaces to arrive at what ACVP tested internally. So for PQC testing I think we should wait for the announced tests for the "external" interfaces that will give us valid data to test.