Extend wc_MakeCert_ex/wc_SignCert_ex/wc_MakeCertReq_ex to issue HSS/LMS and
XMSS/XMSS^MT certificates and PKCS#10 requests, building on the existing
RFC 9802 verification support. New LMS_TYPE/XMSS_TYPE/XMSSMT_TYPE selectors,
wc_{Lms,Xmss}Key_PublicKeyToDer SPKI encoders, runtime signature-buffer
sizing, and sigType/key consistency checks. Generation is ASN.1-template
only, matching where the verification path lives.
Tests generate self-signed roots, CSRs and a CA->ECC-leaf chain in-process
and verify them, replacing the patched Bouncy Castle fixtures (only the stock
RFC 9802-aligned LMS interop anchor is kept).
Move out DTLS 1.3 specific tests into test_dtls13.c. (Also move out from
test_dtls.c)
Move out DTLS tests into test_dtls.c.
Move out LMS and XMSS tests into test_lms_xmss.c.
Move out SSL session tests into test_session.c.
Move out remaining ML-DSA/Dilithium tests in api.c into test_mldsa.c.