Generate poisoning wrappers for AEAD

Modify wrapper generation script to generate poisoning calls and
regenerate wrappers.

Signed-off-by: David Horstmann <david.horstmann@arm.com>
diff --git a/tests/scripts/generate_psa_wrappers.py b/tests/scripts/generate_psa_wrappers.py
index 3cdafed..8acd4e3 100755
--- a/tests/scripts/generate_psa_wrappers.py
+++ b/tests/scripts/generate_psa_wrappers.py
@@ -142,7 +142,8 @@
                                     _buffer_name: Optional[str]) -> bool:
         """Whether the specified buffer argument to a PSA function should be copied.
         """
-        # Proof-of-concept: just instrument one function for now
+        if function_name.startswith('psa_aead'):
+            return True
         if function_name == 'psa_cipher_encrypt':
             return True
         if function_name in ('psa_import_key',