F-5632: zeroize Camellia key schedule on cipher free

FreeCiphersSide freed cipher->cam with XFREE only, leaving the expanded
key schedule and IV in freed heap memory. Call wc_CamelliaFree (which
ForceZeros the context) before XFREE, matching the ARIA cleanup above.

src/internal.c

@@ -3282,6 +3282,7 @@ static void FreeCiphersSide(Ciphers *cipher, void* heap)
     cipher->aria = NULL;
 #endif
 #ifdef HAVE_CAMELLIA
+    wc_CamelliaFree(cipher->cam);
     XFREE(cipher->cam, heap, DYNAMIC_TYPE_CIPHER);
     cipher->cam = NULL;
 #endif