lib: Add SLH-DSA tests and per-algorithm PQC gating

This replaces the single HAVE_OPENSSL_PQC/DISABLE_PQC with
per-algorithm CMake variables (ML-KEM, ML-DSA, SLH-DSA), gated by the
OpenSSL versions: ML-KEM and ML-DSA require >= 3.4, SLH-DSA >= 3.5.

SLH-DSA was already working, but now added explicit authentication
tests for it with a full certificate chain (root CA, intermediate CA,
server) to show full support.

Rename PQC test files and cert headers to use algorithm-specific names
(ml_kem, ml_dsa, slh_dsa) and move cert headers to
include/test/certs/.

Signed-off-by: Dimitri Staessens <dimitri@ouroboros.rocks>
Signed-off-by: Sander Vrijders <sander@ouroboros.rocks>

0 files changed, 0 insertions, 0 deletions