tests: guard DsaSign_ex / DhGenerateParams tests for the frozen selftest API

The CAVP-selftest-v2 CI leg configures with --enable-dsa --enable-keygen
(richer than the minimal selftest profile), so it compiles two more
functions that call wolfCrypt APIs absent from the frozen v4.1.0 module:
  - test_wc_DsaSign_bad_digestSz -> wc_DsaSign_ex / wc_DsaVerify_ex
  - test_wc_DhGenerateParams_and_ExportRaw -> wc_DhGenerateParams /
    wc_DhExportParamsRaw
Exclude both from HAVE_SELFTEST / HAVE_FIPS builds. Only a frozen build
run under the CAVP config (DSA + keygen on) exposes these.

Author: danielinux

tests/api/test_dh.c

@@ -956,7 +956,8 @@ int test_wc_DhGenerateParams_and_ExportRaw(void)
  * domain parameters (wc_DhGenerateParams returns PRIME_GEN_E), so the
  * generate-and-export flow below is only valid with the full SP math
  * (WOLFSSL_SP_MATH_ALL), fastmath or heapmath backends. */
-#if !defined(NO_DH) && defined(WOLFSSL_KEY_GEN) && !defined(WOLFSSL_SP_MATH)
+#if !defined(NO_DH) && defined(WOLFSSL_KEY_GEN) && !defined(WOLFSSL_SP_MATH) && \
+    !defined(HAVE_SELFTEST) && !defined(HAVE_FIPS)
     DhKey dh;
     WC_RNG rng;
     /* g is found by an unbounded incrementing search (wc_DhGenerateParams),

tests/api/test_dsa.c

@@ -759,7 +759,8 @@ static void dsa_test_fill_hex(char* dst, int len)
 int test_wc_DsaSign_bad_digestSz(void)
 {
     EXPECT_DECLS;
-#if !defined(NO_DSA) && !defined(WC_FIPS_186_5_PLUS)
+#if !defined(NO_DSA) && !defined(WC_FIPS_186_5_PLUS) && \
+    !defined(HAVE_SELFTEST) && !defined(HAVE_FIPS)
     DsaKey key;
     WC_RNG rng;
     byte   signature[DSA_SIG_SIZE];