Dilithium: add implementation of signing that allocated less

Added implementation of signing that allocates less memory by doing the
matrix/vector loops in the sign code - WOLFSSL_DILITHIUM_SIGN_SMALL_MEM.
Split out vector operations into vector and polynomial operations so
that small mem signing can call them.
Fix benchmark to be able to compile with only Dilithium and no
asymmetric algorithms.

wolfcrypt/benchmark/benchmark.c

@@ -1226,7 +1226,7 @@ static const char* bench_result_words1[][4] = {
     defined(HAVE_CURVE25519) || defined(HAVE_CURVE25519_SHARED_SECRET)  || \
     defined(HAVE_ED25519) || defined(HAVE_CURVE448) || \
     defined(HAVE_CURVE448_SHARED_SECRET) || defined(HAVE_ED448) || \
-    defined(WOLFSSL_HAVE_KYBER)
+    defined(WOLFSSL_HAVE_KYBER) || defined(HAVE_DILITHIUM)
 
 static const char* bench_desc_words[][15] = {
     /* 0           1          2         3        4        5         6            7            8          9        10        11       12          13       14 */
@@ -1692,15 +1692,15 @@ static const char* bench_result_words3[][5] = {
     defined(HAVE_CURVE448) || defined(HAVE_ED448) || \
     defined(HAVE_ECC) || !defined(NO_DH) || \
     !defined(NO_RSA) || defined(HAVE_SCRYPT) || \
-    defined(WOLFSSL_HAVE_KYBER)
+    defined(WOLFSSL_HAVE_KYBER) || defined(HAVE_DILITHIUM)
     #define BENCH_ASYM
 #endif
 
 #if defined(BENCH_ASYM)
 #if defined(HAVE_ECC) || !defined(NO_RSA) || !defined(NO_DH) || \
     defined(HAVE_CURVE25519) || defined(HAVE_ED25519) || \
     defined(HAVE_CURVE448) || defined(HAVE_ED448) || \
-    defined(WOLFSSL_HAVE_KYBER)
+    defined(WOLFSSL_HAVE_KYBER) || defined(HAVE_DILITHIUM)
 static const char* bench_result_words2[][5] = {
 #ifdef BENCH_MICROSECOND
     { "ops took", "μsec"     , "avg" , "ops/μsec", NULL },   /* 0 English
@@ -2654,7 +2654,7 @@ static void bench_stats_sym_finish(const char* desc, int useDeviceID,
 #if defined(HAVE_ECC) || !defined(NO_RSA) || !defined(NO_DH) || \
     defined(HAVE_CURVE25519) || defined(HAVE_ED25519) || \
     defined(HAVE_CURVE448) || defined(HAVE_ED448) || \
-    defined(WOLFSSL_HAVE_KYBER)
+    defined(WOLFSSL_HAVE_KYBER) || defined(HAVE_DILITHIUM)
 static void bench_stats_asym_finish_ex(const char* algo, int strength,
     const char* desc, const char* desc_extra, int useDeviceID, int count,
     double start, int ret)