tests: Add functional tests for ecb/cbc helpers

Test the following helper functions using AES with 128, 192, and
256 bit keys:
  - grub_crypto_ecb_encrypt(),
  - grub_crypto_ecb_decrypt(),
  - grub_crypto_cbc_encrypt(),
  - grub_crypto_cbc_decrypt().

Signed-off-by: Srish Srinivasan <ssrish@linux.ibm.com>
Reviewed-by: Sudhakar Kuppusamy <sudhakar@linux.ibm.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
Reviewed-by: Glenn Washburn <development@efficientek.com>

grub-core/Makefile.core.def

@@ -2272,6 +2272,11 @@ module = {
   common = tests/argon2_test.c;
 };
 
+module = {
+  name = crypto_cipher_mode_test;
+  common = tests/crypto_cipher_mode_test.c;
+};
+
 module = {
   name = legacy_password_test;
   common = tests/legacy_password_test.c;