Functional test: Fix build for MLK_CONFIG_NO_RANDOMIZED_API

The reduced-API refactor guarded the randomized round-trip tests in
test_mlkem.c on !NO_KEYPAIR_API && !NO_ENCAPS_API && !NO_DECAPS_API, but
omitted !NO_RANDOMIZED_API. The public header only exposes
crypto_kem_keypair() and crypto_kem_enc() when NO_RANDOMIZED_API is
unset (nested inside the keypair/encaps API guards), so a plain
CFLAGS="-DMLK_CONFIG_NO_RANDOMIZED_API" make failed to compile
test_mlkem.c with implicit-declaration errors.

Add the missing !NO_RANDOMIZED_API term to both guard blocks, matching
the pattern already used in test_stack.c, test_rng_fail.c and
test_alloc.c. The deterministic test_kem_expected_* vectors keep
exercising keygen/encaps/decaps under NO_RANDOMIZED_API; only the
randomized round-trip loop is compiled out.

Signed-off-by: Hanno Becker <beckphan@amazon.co.uk>

Author: hanno-becker

test/src/test_mlkem.c

@@ -29,7 +29,9 @@
 
 
 #if !defined(MLK_CONFIG_NO_KEYPAIR_API) && \
-    !defined(MLK_CONFIG_NO_ENCAPS_API) && !defined(MLK_CONFIG_NO_DECAPS_API)
+    !defined(MLK_CONFIG_NO_ENCAPS_API) &&  \
+    !defined(MLK_CONFIG_NO_DECAPS_API) &&  \
+    !defined(MLK_CONFIG_NO_RANDOMIZED_API)
 /* Forbid inlining so stack buffers below stay in short-lived
  * frames and don't stack up in main(). This helps testing on
  * memory-constrained targets such as AVR. */
@@ -166,7 +168,7 @@ static MLK_NOINLINE int test_invalid_ciphertext(void)
   return 0;
 }
 #endif /* !MLK_CONFIG_NO_KEYPAIR_API && !MLK_CONFIG_NO_ENCAPS_API && \
-          !MLK_CONFIG_NO_DECAPS_API */
+          !MLK_CONFIG_NO_DECAPS_API && !MLK_CONFIG_NO_RANDOMIZED_API */
 
 /*
  * Test each API operation independently against pre-computed test vectors.
@@ -288,15 +290,17 @@ int main(void)
   {
     r = 0;
 #if !defined(MLK_CONFIG_NO_KEYPAIR_API) && \
-    !defined(MLK_CONFIG_NO_ENCAPS_API) && !defined(MLK_CONFIG_NO_DECAPS_API)
+    !defined(MLK_CONFIG_NO_ENCAPS_API) &&  \
+    !defined(MLK_CONFIG_NO_DECAPS_API) &&  \
+    !defined(MLK_CONFIG_NO_RANDOMIZED_API)
     r |= test_keys();
     r |= test_keys_unaligned();
     r |= test_invalid_pk();
     r |= test_invalid_sk_a();
     r |= test_invalid_sk_b();
     r |= test_invalid_ciphertext();
 #endif /* !MLK_CONFIG_NO_KEYPAIR_API && !MLK_CONFIG_NO_ENCAPS_API && \
-          !MLK_CONFIG_NO_DECAPS_API */
+          !MLK_CONFIG_NO_DECAPS_API && !MLK_CONFIG_NO_RANDOMIZED_API */
     if (r)
     {
       return 1;