feat: add keygen with seed for all mldsa variants and falcon1024

[manel1874]

This exposes the following methods:

For Falcon1024

• PQCLEAN_FALCON1024_CLEAN_crypto_sign_keypair_with_seed
• PQCLEAN_FALCON1024_AVX2_crypto_sign_keypair_with_seed
• PQCLEAN_FALCON1024_AARCH64_crypto_sign_keypair_with_seed

For Falcon1024 padded

• PQCLEAN_FALCONPADDED1024_CLEAN_crypto_sign_keypair_with_seed
• PQCLEAN_FALCONPADDED1024_AVX2_crypto_sign_keypair_with_seed
• PQCLEAN_FALCONPADDED1024_AARCH64_crypto_sign_keypair_with_seed

For ML-DSA-X (for X = (44, 65, 87):

• pqcrystals_ml_dsa_{X}_avx2_keypair
• pqcrystals_ml_dsa_{X}_ref_keypair

These two signature variants are now able to generate keypairs from a seed using OQS_SIG_keypair_with_seed or sig->keypair_with_seed .

For signatures where it is not supported a keygen from seed, the above operation yields OQS_STATUS = OQS_ERROR.

Tests

Included nore tests in sig_keypair_with_seed.c for ml-dsa and falcon1024 variants.

Manual run:

mkdir build && cd build
cmake -GNinja ..
ninja
cd tests
./sig_keypair_with_seed