20260115-PQC-WOLFSSL_NO_MALLOC

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wolfcrypt/test/test.c:

• tweaks to xmss_test() for compatibility with WOLFSSL_NO_MALLOC && NO_WOLFSSL_MEMORY;
• fixes for return codes in dilithium_test().

wolfssl/wolfcrypt/dilithium.h: add !WC_NO_CONSTRUCTORS gate around wc_dilithium_new() and wc_dilithium_delete() prototypes, to match gating in implementation.

This PR allows PQC successful testwolfcrypt in the allcryptonly-no-malloc-no-wolf-memory multi-test scenario, which forces all XMALLOC() calls to fail (return NULL).

The passing config is:

$ ./configure --quiet --enable-fips=disabled 'EXTRA_CPPFLAGS=-Werror' '--srcdir' '.' '--disable-jobserver' '--enable-option-checking=fatal' '--enable-all-crypto' '--enable-experimental' '--enable-kyber=yes,original' '--enable-lms' '--enable-xmss' '--enable-dilithium' '--enable-dual-alg-certs' '--disable-qt' '--disable-dual-alg-certs' '--enable-cryptonly' '--disable-pkcs12' '--disable-ecccustcurves' '--disable-brainpool' '--disable-dsa' '--disable-srp' '--disable-scrypt' '--disable-eccsi' '--disable-sakke' '--disable-pkcs7' 'CC=gcc-16' 'LDFLAGS=-g -fno-omit-frame-pointer -fsanitize-recover=all -fsanitize=address,pointer-subtract,leak,undefined,float-cast-overflow,float-divide-by-zero,bounds-strict -fsanitize-recover=all ' 'CFLAGS=-DTEST_ALWAYS_RUN_TO_END -DWC_SIPHASH_NO_ASM -DWC_DEBUG_CIPHER_LIFECYCLE -g -fno-omit-frame-pointer -fsanitize=address,pointer-subtract,leak,undefined,float-cast-overflow,float-divide-by-zero,bounds-strict -fsanitize-recover=all --param=max-vartrack-size=128000000 -DWOLFSSL_NO_MALLOC -DWOLFSSL_SP_NO_MALLOC -DWOLFSSL_SP_NO_DYN_STACK -DNO_WOLFSSL_MEMORY -UHAVE_ECC_KOBLITZ -UWC_DEBUG_CIPHER_LIFECYCLE -DWOLFSSL_XMSS_VERIFY_ONLY -DWOLFSSL_DILITHIUM_VERIFY_NO_MALLOC -DWOLFSSL_DILITHIUM_VERIFY_SMALL_MEM -DWOLFSSL_DILITHIUM_NO_MAKE_KEY'

[douzzer]

retest this please

[douzzer]

Note hostap tests are down due to upstream repo server.